(NSFW) Eating out [m]y g[f] goes horrifyingly hilarious (long)

So this is more of a funny story then anything else but worth telling. If you're good friends with me you've heard the story in real life at least once.

In high school I dated this girl named May. May was tall, just a few inches below my then 6'0" lanky dork build. Small breasts, skinny, long blonde hair that had a little curl to it. Great smile. Now, May's parents were unique. As soon as we started dating (sophomore year, we were 16), her mom offered the pill. Her mom encouraged May's sex life in a healthy way and we had loads of sex for the two years we dated. About a year into our relationship, we were cuddling and watching a movie in her bed when her mom poked her head in the door.

"May, we're going to a movie. Be back in a couple hours. You and John have the house to yourselves," she said. As always I was taken aback by her nonchalant attitude towards me banging her daughter (my parents were much stricter). A few minutes later we heard the front door close and their car pull out of the driveway.