How to effectively have sex in a bathtub??

L

One of my girlfriend’s (trans girl) biggest fantasies ever is having sex with me in a bubble bath.

I posted a question about this yesterday and so many people told me that the condom would rip, we wouldn’t be lubricated, etc.

But she’s honestly wanted this for years. So my question is, how can we effectively do this? Lol. Like I really want to make it happen for her. Any advice would help