About my best friend liss and her creepy brother in law?

well creepy. you mention laptop.... why don't you set it up to discreetly video your room... leave ur clothes on the bed or somethin in view of laptops camera, leave ur door a tiny bit ajar, then hang down in kitchen or sumfin... hopefully you'll get vid evidence of his weird behaviour, then his missus can't defend him & the mum will make them get their own place. u should talk to liss too, you say you're close. it doesn't sound very safe for either of you under the same roof as this guy :S