In Illinois, there is a presumption of a 50/50 property split even if there was an affair. The only way an affair might affect the property settlement is if your wife possibly spent money on the affair (e.g. hotel rooms with the other person, vacations, meals, etc). Then your wife might have done something called "dissipation," in which case you would be entitled to reimbursement from her share of the property settlement to make up for whatever amount she spent on the affair.
Answered on Sep 10th, 2012 at 10:58 AM