I don't want someone who slept with my fiancé once years ago to come to our wedding. AITAH?

My fiancé (25F) and I (29M) have been together for 3 years total, engaged for 1 year, and are planning a wedding approximately 1 year from now.

7ish years ago she had drunken sex with a schoolmate when they were 17. (In our relationship she has even hinted that they were so drunk it was potentially borderline non-consensual; she has no interest in pursuing that further)

This schoolmate then started dating one of my fiancé's good friends from the same school and they have been together for probably 5yrs. My fiancé and this friend see each other extremely infrequently but do chat on snapchat and other social media.

Effectively our problem is that I do not want anybody that has had sex with my wife to be at our wedding. That unfortunately precludes her friend from being able to bring her long-term boyfriend. I do understand the situation sucks for my fiancé, but I feel very uncomfortable with him being at our union of commitment and love.

I basically said there is a zero percent chance that someone who has slept with my wife is going to be at my wedding, and she is quite pissed, and even said in a text message "This is your ego hurt and your dick feeling small, and I'm not going to tolerate this". Ouch.

I've continued to be calm when discussing this because although it sucks, in my opinion I am absolutely entitled to put my foot down on this. Am I the asshole here? Thanks in advance for input.