Dad has recently gotten himself a much younger girlfriend whom he has moved in last month. My bedroom and their bedroom are wall to wall. The fact that they fuck doesn’t make me uncomfortable - so happy for them, but they do it on max volume. No joke. Every night at 11 and in the morning at 6 on the clock. These walls are paper thin apparently.
When you know they’re in there, but it’s not 11pm or 6am, call up someone on the phone, or cough, or hum to yourself. Just make mid level noises. The point is to get them to realize that if they can hear you, then you can hear them.