Akward between me and my friend

A couple of months ago my friend introduced me to her friend. At first it started off as a really good friendship, we would hangout, movies, ETC. But; a couple days ago I started noticing that she kept looking at me weird. I knew what this meant, but I never thought anything would happen. So one day we were watching a movie and out of nowhere she kissed me and I found it kind of weird at first but was actually ok with it soon after. So as days went on we started taking out friendship to the next level like we would make out, she would want me to squeeze her ass, feel her up, and rub her down there. But soon she started telling her friends about it. So I told her to stop, and she did. But yesterday we were all hanging out watching a movie at her friend’s house. I go thirsty and went down stairs to go get some water from the kitchen. So when I got my water and turned around to go back upstairs to the living room, her friend walked in and slowly closed the door. I thought it was a joke at first and laughed. But right before i left she stopped me and took my drink and set it down on the table. I was confused to what she was doing, suddenly she started making out with me, she took her top off and left her blue bra on and slow moved my hands to her ass and squeezed. I was really surprised at first but started to like it. As a few minutes went by, she got my right hand and put in her pants and started rubbing her pussy with my finger. I asked her if this was really ok with her and why did she wanted to do at this moment and she said "yeah...I wanted this for a long time. So I started to get into the mood and slowly put my hand down her underwear and fingered her. As I fingered her she started to feel my crouch. so as we were doing this she let out a loud moan and I immediately stopped her and told her we had to stop cause one, we were gone for a while and everyone was getting suspicious. And two, everyone might have heard her loud moan. But she just smiled and said “we cant stop now, my pussy is so f**king wet” and stared making out with me again. So as she climaxed, our friend walked in and got really angry at us, but after her friend pulled her underwear, pants and top back on and left, she stopped, smiled and said "it should have been me".