My current gf Alice and I have been dating for couple months. Before we started dating when we were just hooking up I was fucking her, this other girl Jen who was pretty much in love with me, and another fun plate consistently. As well as hooking up with whatever random trim I found. Now one day when I was fucking Jen I sent my Alice a picture of me in Jens room dancing around in my underwear. Needless to say she got pretty pissed at me and wanted nothing to do with me. I lied to her and told her that Jen was just a friend and I was just returning a book or something (ridiculous I know). But anyway Alice immediately starts putting up pics on her snapstory with some other dude. This is obviously to make me jealous and I assume that she was fucking him. We make up over the course of a couple weeks, then we become official. My question is do I have a right to be upset about this? We weren't official when she did it and also the only reason she did that was because I literally sent her a Pic of me half naked in some other girls room.

TL;DR: my gf hooked up with a guy before we were dating because I send her a Pic of me half naked in some other girls room. Do I have a right to be upset about her hooking up with that dude?