“All hunter wants to do is have sex even when I’m trying to go to bed”

Obviously she’s pregnant so it’s no secret that the mom knows they are sexually active but WHY IS SHE SO COMFORTABLE SAYING THIS INFRONT OF HER MOM? And why is the mom so nonchalant about this? I can’t be the only one who thinks this is insane, even if she is pregnant. They are 15 and 13. I get more baffled every week watching this show tbh. Not to mention her mom is constantly taking up for him which I don’t understand? Anyways