I don’t know where the common misconception comes from that a spouse’s infidelity matters in divorce proceedings, but I’m sorry to burst your bubbles: it doesn’t.
The wife could’ve been going to Rawdog City with her boss for years, and it doesn’t matter. She can still take her half of the matrimonial property and potentially qualify for alimony if their respective financial circumstances warrant it.
Now the odds are that he won’t have to pay alimony, and I say that for two reasons: we know from the story that she’s got a job and earns her own living, and secondly, if the husband is convicted on his criminal charges he won’t be in a position to earn any income for a while and will thus be unable to pay alimony.
However, if he goes to jail then wife’s going to get sole custody of the kids and she’ll be entitled to child support. Womp womp.