My daughter and her gf

I need advice on my 13yo daughter.
She is a great kid high honor roll does her chores with out mouth or anything well she got a gf back in October and then they broke up in Jan then got back together and I yell at them before when they dated first time no kissing they said they don’t no more I trusted til I took my daughter dress shopping and seen Vickie’s on her chest on her boobs I was sooo livid now I took her phone and she isn’t aloud to have her gf over but I’m at a loss on what to do advice please