When she cheated, the property question

I had the meeting in a coffee shop on a side street, because the lawyer's office felt like overkill for a free first conversation. I had brought notes. Two pages of them, neat handwriting, dates and amounts and a section at the bottom titled "her behaviour" with three subheadings. I slid the pages across. The lawyer read for maybe forty seconds, then turned to the second page, then back to the first, and said, "you are a careful person, this is helpful, but I need to tell you the affair is irrelevant to the property settlement". I felt a small piece of my plan collapse on the table. He saw it. He said, "I know. Most men I sit with bring a version of this list".

Australian family law is, by international standards, almost aggressively no-fault. Since 1975, the only ground for divorce has been irretrievable breakdown, evidenced by twelve months separation. And, more importantly for settlement purposes, infidelity is not a property factor in the vast majority of cases. Whatever she did, with whoever, while you were married, does not, on its own, change the percentages.

This piece is for the man holding the list. The one who cannot believe the betrayal does not buy him an extra ten percent. It is also for the man one step further along, who has heard the law, accepted it intellectually, and is still trying to find the angle. There usually is not one. Here is what is, and what is not, true.

The general rule: infidelity is not a property factor

The Family Law Act sets out what the court must consider when dividing property. The list includes financial and non-financial contributions during the relationship, future needs (income disparity, age, health, care of children), and what is just and equitable. Conduct, in the moral sense, is not on that list.

The court will not award you a larger share because she had an affair. The court will not punish her for the breakdown of the marriage by giving her less. The cause of the marriage ending, in itself, is not legally relevant.

This is hard to accept. It feels wrong. The intuition that bad behaviour should have consequences is very deep, and it does not switch off because a piece of legislation says so. But the legislative choice was deliberate. Fault-based divorce, before 1975, was a moral war zone, with each party trying to prove the other was the worse person to extract a better outcome. The system was bitter, slow, expensive, and produced outcomes that often had nothing to do with what was fair financially. The Whitlam reforms removed fault from the equation precisely to depoliticise the breakdown itself.

The result, fifty years on, is a settlement system that focuses on contributions and needs, not blame. It is colder. It is also, on average, faster, cheaper, and more focused on the actual problem (how to divide what you have).

What does affect the property settlement

There are three categories of conduct that DO affect property settlement, and they are sometimes confused with infidelity.

Waste and dissipation. If she (or you) took marital assets and spent them on the affair, gambled them away, or otherwise diminished the asset pool through reckless or deliberate conduct, that can be addressed. Money spent on hotels, gifts, holidays for the affair partner, drawn from joint accounts or marital savings, can be added back to the pool as a notional asset and attributed to the spending party. The key is that the court must be persuaded the spending was outside ordinary marital expenditure and reduced the pool available for division.

This is sometimes called "add-back" jurisprudence. It is fact-specific and the bar is meaningful. Reasonable lifestyle expenses, even during the affair, are usually not added back. Ten thousand dollars of joint savings spent on weekends in Byron with the affair partner, when you were not aware, can be.

Family violence. The Kennon principle (from a 1997 case of that name) recognises that family violence by one spouse against the other can be relevant to the contributions assessment. The argument is that the abused spouse's contributions were made significantly more arduous by the violence, and so should be weighted more heavily. The legal threshold is high: not every difficult marriage qualifies, the violence must have had a discernible impact on the victim's ability to contribute. But it exists, and it is the principal way conduct can move percentages.

This usually arises with men as the perpetrator and women as the affected party, but it can apply either way.

Negative contribution. If a spouse has, through their conduct (gambling, addiction, criminal behaviour), made significant negative contributions to the marriage, this can be weighed in the contributions assessment. Again, fact-specific, and a high bar.

Notice that infidelity, on its own, is not in any of these categories. An affair, in itself, is not waste, not violence, not negative contribution. It becomes relevant only if it generated waste (money spent on the affair), or family violence (controlling behaviour, coercion), or some other recognised conduct.

The grief vs strategy split

What I see, in myself and in men I know, is a confusion of two different processes happening simultaneously.

There is grief. The grief is real. The betrayal is real. The marriage, the trust, the version of your life you thought you were living, is gone, and the loss deserves its space.

There is strategy. Strategy is what you do about the property pool, the parenting arrangements, the housing question, the financial future. Strategy is forward-looking, technical, transactional.

The trap is when grief tries to drive strategy. You want the affair to matter, in the settlement, because it matters to you. You want a number that reflects what she did. The legal system declines to provide that number, and you are left feeling unheard, and the impulse is to fight harder, spend more on lawyers, document more, demand more, in a search for an outcome that the system structurally cannot give you.

This is the most expensive emotional mistake men make in divorce. Tens of thousands of dollars in legal fees, months of additional conflict, kids in the middle of the conflict, all directed at extracting a moral victory the law does not stock.

The split, when you can manage it, looks like this. Grieve. Hard. Properly. With friends, a therapist, a men's group, a long walk every morning. Separately, run the strategy as a financial and parenting transaction, with a lawyer who is calm, technical, and not in love with conflict. The two processes can happen in parallel. They cannot happen through the same person, in the same conversation.

The trap of trying to make it punitive

Men who try to weaponise the settlement after infidelity tend to discover three things.

The lawyers love it. Conflict is billable. A solicitor who is willing to chase every theoretical avenue (forensic investigation of her affair-spending, character allegations in affidavits, refusing to negotiate until she "admits" things) can run a meter for years. Some lawyers are professionally excellent and will gently steer you off this. Others will not.

The judges hate it. Family law judges see hundreds of these matters. They can spot grief-driven litigation in the first reading. Conduct allegations that do not meet the legal threshold annoy them. Costs orders are sometimes made against parties who run cases that are more about feelings than facts.

The kids notice. If you have children, prolonged conflict around the affair contaminates their experience of both parents. They do not need to hear what mum did. They need both parents to behave like adults while their world rearranges itself.

The men I have spoken to who tried the punitive route, two years on, almost universally describe it as the worst single decision of the divorce. Money gone, energy gone, kids strained, and the percentage outcome the same as what they were offered at mediation in month three.

What practical guidance actually looks like

If she cheated, and you are in or approaching a property settlement, here is what works.

• Decide who you grieve to, and who you strategise with. Different people. Different conversations.
• Engage a lawyer who has done this for twenty years and has a calm voice. Ask them, directly, whether the affair will affect your settlement. If they say "it depends, we will explore", be wary. If they say "almost certainly not, but here are the specific things that might matter", you have found the right person.
• Investigate waste. If you have any reason to think marital money was spent on the affair, get the bank statements (you have a right to see joint accounts), look for unfamiliar patterns, and have your lawyer formally raise add-back if there is something to raise.
• Document family violence, if any. If her behaviour involved coercion, controlling tactics, threats, or other abuse, this is the only context where conduct genuinely moves percentages, and it requires specific evidence.
• Settle as quickly as the facts allow. The longer it runs, the more the asset pool is consumed by legal fees, and the more your life stays paused.
• Tell the kids nothing about the affair. Whatever they need to know about why mum and dad are not together, age-appropriate, non-blaming, not now. The truth (in age-appropriate form) can come later if it ever needs to.
• Reserve your moral position privately. You do not have to forgive her. You do not have to pretend it did not happen. You just do not bring it into the settlement room, because the settlement room cannot hold it.

The reframe that helps

The point of property settlement is not justice for the marriage. It is allocation of the resources that exist on the day, between two people who used to share them, in a way that lets each of them get on with the next phase. That is all the system is trying to do. It is a smaller, more specific question than "who was right and who was wrong".

Once you accept that, the affair becomes irrelevant to the room you are in. It remains relevant to your life, your healing, your understanding of the marriage, your future relationships. But it is no longer something you are trying to monetise. The disentanglement is, oddly, freeing.

The number that comes out the other end is the number. Your moral position is yours, and you can hold it without needing the settlement to validate it.

PROTECT the next phase. Grieve elsewhere. Settle clean.

She is gone. Your future is not.