My wife’s 17 year old niece is staying with us for the Summer and while I was in our large walk-in bedroom closet putting clothes away, she came in with some girl and they immediately started having s** on our bed. They didn’t know I was in there and I froze because I didn’t know what to say or do so I just let them finish. Never told my wife or her mom because I feel like they’d accuse me of watching them or getting aroused.