Image imported from derpibooru
Original Description:

Sally remembers the time Crystal and friends went out on a party and these two got pretty drunk and the end results were… amusing for Sally to say the least. Crystal is super embarrassed by this story and never told Tommy about it and Sally ensures that Tommy should know! It leaves a lot of questions on how Sally or Crystal can remember that night of them kissing each other, it was simple… her friend Samantha (The mare on the upper right with thumbs up) was sober to witness all of this happening and it can’t be unseen or unheard once told. She might even took a picture to show her friends to leave a lewd memories for them all.