My wife failed her loyalty test

I did a while ago and she said nothing happened. but i asked a few days ago when she was a little tipsy off wine and she said they kissed but went off topic.
The way to "ask her" is to have a few drinks , get her in the mood ,get her naked . Get on your knees eating her pussy and TELL her you know she fucked your friend and go back to eating her while pinching her nipples and tell her what a sexy horny cock slut she is
Say there is no need to hide it ,you already know ,then tongue fuck her .
Tell her the details that you know and that you should have kicked her clean ,if you knew .
She will cum in your face and you can both enjoy her past side fuck in dirty talk from then on
Maybe she will confess to other later on while your licking her