Your girlfriend wants to work at a cosmetic clinic, meaning she will see people who’s lips are too big. I don’t believe she will over do it. Her “filler lady” as I call mine, would tell her to stop when it’s too big.

Most lip fillers are dissolved by the body and do so over time. If she really doesn’t like them she can get them dissolved instantly.

I’m biased because I have lip fillers and my partner was the same as you but after they were done and healed he said “they’re not that big a deal”. Certainly wasn’t a dealbreaker because I wanted bigger lips. It didn’t make me unrecognisable.

I’m sad your girlfriend feels she has chose between her own self confidence and you. I understand why you’re apprehensive but like you said it’s about her, not you.