My girlfriend jerks me off to pictures of her friends and sister [mf]

This has been such an incredible week for me. It started last weekend, when I was hanging out with my 20 year old girl, and two of her friends, who both happen to be very attractive. One of them, Emily, has a really amazing ass, and ofcourse she was wearing tight leggings as she typically does, and I always check her out as much as I can. Her other friend Dana, has great tits, and was ofcourse in a loose red tank top that night, and I snuck a few peaks at her as always, too.

Well after the night ended and the two of them left, my girlfriend and I were fooling around, and she starts jerking me off, and talking dirty to me, which is normal. But then she says “Your’e a little more riled up than usual tonight aren’t you?” “Does that have anything to do with Emily walking around in those tight pants all night, with her big ass?” A bit hesitant this could be a trap haha, I denied that, but suddenly she starts pulling out her phone.