I(27M) came to know my Gf(25F) shared nudes

In a relationship with this person for 2 years. I was on a phone call with her this evening. When she revealed to me. That she used to share nudes, sext and flirt with a senior in college. She has already told about her past . Everything about exes and sexual partners. Me on the contrary am more of a first timer as she's my 1st. But I don't know why this nudes thing just suddenly disgusted me more than the fact that she had sexual partners in the past.

Open to suggestions. Please leave opinions.