Sibling's Caught

When my family go on vacation, Our two children a boy and a girl always shared a room. When my Son turned sixteen and his Sister was fourteen, they complained about sharing a room and not having any privacy. I discussed it with my Husband. He said: We can't afford another room. I suppose I could share a room with Marc and you could share a room with Lori. I said: We have our best sex sessions on vacation. I'm not giving that up. We convinced the kids, to put up with it this time and we'll try to change things next time.
Some nights my Husband and I went out for dinner without the kids. They hung out and looked after their own food. On e night we came back from dinner and I decided to check on the kids. I opened the door between our rooms and was dumfounded to see them fucking. I muttered, I'm so sorry I never knocked and shut the door. My husband came out of the bathroom and asked how the kids we're doing. I said; They were doing good.
The next day when my Husband and Son went to hit some golf balls, I asked Lori how long they've been fucking. She said; We could hear you and Dad going at it through the door. Having no privacy to ourselves, we started doing each other. Once we started we couldn't stop until we fucked. I told them if their going to continue, they need protection. I knew I couldn't stop them so I went out and bought them some condemns. When we got home they continued to fuck and Lori was on Birth control.