Don't do it. He fukked her and that's that. Y'all would never be able to spend time together as friendly couples without that being in the back of everyones mind.
He was inside that whore. Thrusting. Grabbing. Sweating. Getting unmeasurable pleasure. Savoring all the smells, feels, the entire "essence" of sex. Until he finally couldn't take it anymore and deposited his seed deep in her guts.
And you want to date her?
Imagine you marry the broad and have a son with her. 16 years down the road...you and your family are sitting out on the back porch enjoying a summer evening...and your friend and his wife show up unannounced with a case on some "lets reminisce, friends" type shyt. They get to talking about how everyone first met. And the topic of their history comes up. Your wife sitting their like
Your friends wife sitting their like
Your friend sitting their like
Your son sitting their like
And you're sitting their just waiting to die.
Don't do it.