Girlfriend watches porn

I’m in a lesbian relationship and just asked my gf if I could do something on her phone, but she’d left a tab open with porn. My issue isn’t the porn, but the type it was. “Forceful anal sex” - this has made me feel incredibly uncomfortable as I was sexually abused and raped by an ex boyfriend. I feel like I can’t bring this up with her, but the idea that she’s into that is making me feel sick. Any advice?