My 14 yr old son was caught masturbating in his friends hot tub.

Hey I kinda have a big problem. My oldest son (14yrs) went to a friends birthday party dinner and he was caught masturbating in the hot tub with one of the girls that he likes.What happened was. I got a call from his friends parents and they said they caught my son masturbating in their hot tub and they also saw my son take off this girls clothes in the tub and finger her. It was so embarrassing and they said they don’t want him coming over anymore. This happened yesterday and I’m mortified and I’m pretty sure he is too. He won’t talk to me or my husband. How do I bring this up bc idk what to do now. via /r/Parenting https://ift.tt/2ZB7v8f