Originally Posted by WhatHappened
You have every reason in the world to worry about your wife showing up with bruises. People do assume. Many will not ask for clarification. If they do, will she tell them it's BDSM play with someone else or let them think the worst of you?
She could very well use it to support a claim that her husband is abusing her and that's why she needs a divorce and full custody, if there's no evidence of it being from an extramarital relationship. With no police reports being filed against anyone else, and no public knowledge of your wife being in a BDSM relationship with someone else, people could only assume the marks are from you.
The relationship with the Dom needed to end as soon as he and your wife showed consistent signs of disrespecting the boundaries you and your wife had set.