My sister and her boyfriend touch each other in my presence

I am 18 and my sister in 14 (as is her boyfriend), they are always in our house which I find annoying because when I am at home I generally want some peace and quite, not to listen to obnoxious squawking, which I cannot do anything about. The main problem (when they are not being messy, loud and annoying little s****) is that they as expressing excessive PDA. My parents are not here most of the time so it is only me who is affected. The main things that disgust me is fondling under quilts on the sofa (2m away from me) and loud, noisy snogging. Both of which they are not subtle about, it's like they pretend I'm not here which makes me uncomfortable. I am also pretty sure a hand job was given in my presence. :mad: I am sure they have have regular sex (which I know is really inappropriate due to their age, but what can I do about it?!?), maybe it's their age that is disgusting me. Also I should probably add that I am a virgin and have different views to my whole family (because I went to a decent school) , so maybe I feel uncomfortable because it's not something that I am familiar with, or just that I am a bitter virgin (I'm not). But my point is that what they are doing I am pretty sure is inappropriate, and it is making me uncomfortable in my own home, therefore what can I do about it?! Any advice?! Ps. It is mainly the fault of my sister and not her boyfriend

Put the internet to work for you. via Personal Recipe 2629979