AIBU to be annoyed that DSD(16 nearly 17) is using our house like a hotel? Sorry this is so long
She does very little to help around the house, even though DH and I both work full time and she is only at college part time. She hasn't got a job and so does not contribute anything at all, yet is very wasteful with food and utilities. She wastes electricity like it's an Olympic sport and she's quite possibly the most untidy/lazy teenager I've ever had the pleasure to meet! (and yes I know that's how teenagers are, but she could at least make an effort to hang her wet towels up once in a while).
My main issue is that I feel like she is seriously overstepping the line by quite blatantly having sex with her boyfriend when the rest of us are in the house. I've heard them a couple of times (her bedroom is above the bathroom/my DD's bedroom) and after putting DD(5) to bed last night, I went to the loo and could hear them at it like jackrabbits insert sick face emoji here which I think is rather disrespectful seeing as they knew we were all in and DD had just gone to bed (her bedtime is 8pm and they both know this).
I text her and asked her to please be more considerate, but now I'm wondering if I am within my rights to tell them they are no longer allowed to "get up to stuff" if we are in. She is on the pill, but I'm not sure she's taking it reliably (I have warned her about getting pregnant and she's adamant they are being careful but what else can I do?).
When I was her age, my boyfriend and I weren't allowed in my bedroom (my mum is ultra old-fashioned) but I respected that and we only "got up to stuff" when we knew we were alone in his house... Even when DH and I got together 10 years ago when I was 23, we still weren't allowed in my room at my mum's house.
DH also mentioned to DSD that she'd used a ton of electricity running her heater, but yet she was walking round the house in shorts and t-shirt. He asked that she turn the heater off and put some proper clothes on (this is a recurrent thing with her, she's always walking round in knickers and a t-shirt but complaining it's cold!!) to which she replied "well just kick me out then"! I honestly don't know what her problem is (other than being a typical teenager) she wants for nothing and we are a very happy loving household.
Does anyone have any experience with this type of situation? I don't want to ban her boyfriend from the house as she will probably just move in with him and his mum, but I also don't want her acting like she owns the place and can just do whatever the hell she wants.
Thanks for reading if you've made it this far, and please be gentle with me, step-parenting is a minefield at the best of times.