I (28M) found a sextape on my girlfriend's (27F) phone. And it wasn't ours.

I've been dating my gf for 3 years. I love her very much and would do anything to make her happy. <br><br>I've always suspected that she's been a little promiscuous. She tells me she's been with a lot of guys, but only 1 or 2 at a time. <br><br>So here's where this gets weird. I was checking her phone today because she told me she was feeling insecure because she's been slow to get offers from guys since she's been spending less time socialising. I totally get that, so I said I could feel her phone up if she wanted. <br><br>So I had been checking it for signs of cheating. I checked her Snapchat. Found a guy's conversation. He was calling her a slut and telling her to come over and fuck him. She had said she lived with me now (lie). <br><br>I asked her what was going on, and she just laughed. She said they had been together before her and I, but not recently. I told her that was impossible because she lives with me. She just said... that she sometimes lives in his place too. <br><br>So I asked her to come over to my place, then checked the Snapchat conversation again. He had uploaded a sextape, and she had liked it. I watched it, and it was definitely her and another dude I didn't know. It was pretty recent, looking at the clothes she was wearing. <br><br>I'm pretty sure she's still cheating on me. I'm pretty jealous of this dude too, he's hotter than me and has a sick car. <br><br>I don't know how to approach this. I want to talk to her about it, but I'm afraid I'll make her mad, and she'll just deny it or tell me to go fuck myself. <br><br>Should I confront her? Or just keep monitoring her phone?