Fiance's coworker

So my fiance wants to invite his coworker to the wedding because he says it will cause a scene if he doesn't.

The reason why I don't want to invite her is because when we went to a company retreat she got super super drunk and said she thought my fiance was hot and sexy etc and more details I don't care to repeat.

He doesn't like her like that and was uncomfortable with it but he doesn't want to make it a hostile work environment by not inviting her when he is inviting everyone else and then having to explain what happened.

He is stressing out and I'm pissed because I don't want her at our wedding at all. It's a small company so everyone knows everyone else's business.

Tl;Dr I don't like her and he doesn't either but we are kinda forced to.