sounds bad. can't even imagine just how dysfunctional your day to day interactions around the house must be knowing that your son's fucking your wife. honestly speaking, i very much doubt there's a taboo worse than to commit incest. keep in mind your kid is judging you after every conversation, and keeping all this bottled up/ feigning ignorance isn't going to fix anything. i don't think there is any fixing this, you should leave and try to find some peace away from the both of them. your vows before god no longer apply now that your wife has turned your household into a vipers' den.
Canada