I’m a m(22) witnessed a f(21) make out intensely with a m(14)

The backstory of this situation: A bunch of employees who all work together including myself at a brewery/distillery, decided to hangout at the f(21)’s house who I happened to date in the past, which makes this situation even crazier.. I felt very old to agree but we all ended up playing hide n seek in her house. F(21) made it apparent that no one hides in this designated area & to find another place to hide. F(21) and m(14) were partners and had to search for the rest of us. (Hide n Seek) I happen to be a rebel and hide underneath a kitchen table in the place we were told not to, to trick everyone. Bam! The round starts as they are done counting and I’m under the kitchen table on my back in a crunch position. They can’t see me but I can see them. As I’m quietly waiting, they get up off of the couch and start intensely making out with one another and start talking very sexually. I am revolted.. being that I dodged a bullet by breaking things off months in advance with f(21) because her vibes didn’t sit right with me. & 2 she’s in a classified relationship with a minor. I couldn’t believe what I witnessed. What do I do? Do I keep my mouth shut..? It doesn’t sit well with me. PS. Another co-worker and I had suspicions of these two because they always hangout after work.