UMD-723 What?! My friend's girlfriend crawled into my futon?! "Come on, let's do it? Since we're in the futon, no one will find out, so it's okay◆"

A friend brought his girlfriend to hang out. We had a drinking party at home and they're staying over tonight. Both were sleeping on the sofa, but her boyfriend's snoring was loud, so I lent them my bed. I slept in the corner of the bed trying not to touch her, but her breathing and scent drove me crazy. I shouldn't get excited, but she's my friend's girlfriend... I couldn't help but touch her breasts!!! I thought I'd get yelled at, but she said "Hey, you can continue◆" What do I do!!! In this situation!!