her liking Peach Girl is the epitome of "Woman liking Woman things", I should know, I watched and read it for a spell in the early 2000s when I was in my "I must devour any and all anime content" phase
it's cute, there should be no shame in it, but if she likes Peach Girl there's plenty more "embarrassing", "girly" stories that we'll slowly learn she likes over time, and I for one am looking forward to her gushing over them