So the other night I was giving my girlfriend's best friend a piggy back ride like normal when she gets too drunk. I don't mind because its the nice thing to do, and it's not so bad having a pretty girl clinging to you and it's ok because she's a friend. Well like usual we were going along and she was laughing until something stood out to me, I think she is maybe moaning a little!? We keep walking and it starts to get more rythmic with when I bounce as I walk so I do a little experiment, I stop to readjust and move my hands a little bit farther up the inside of her thighs and squeeze a little sexually while purposefully bouncing her right on my spine and I swear she presses her face against my neck and let's out such a moan into my ear that I can't resist! For the rest of the walk now I make it clear that I am trying to get her off, I start grabbing her thighs more sexually and grinding her pussy into my back as I bounce her. I swear at this point she is loving it and moaning so much that I don't know how my girlfriend can't tell, thank god she thought she was just laughing weird. Finally we get close to her house and I don't want it to end so I enjoy the last few minutes of it groping her thighs and almost her ass while I make her grind my back so hard, until I hear her say in the most unmistakable way, "I'm cumming so hard right now". I thought about it and there is no way she would have said anything close to that for any other reason. hopefully I get another chance to do it again soon so I can really test if we might have a little naughty secret that we can keep from my girlfriend, nothing wrong with a little innocent orgasm right? ;)