my boyfriend [m] likes to finger me [f] while we watch tv with his roommates

my boyfriend and i watch tv with his roommates a lot. my boyfriend used to poke my pussy under the blanket as a joke. but a few times now i’ve grabbed his hand and guided him to stay down there. now he plays with my clit and fingers me with them in the room. it turns me on a lot and now he does it more often. sometimes i have to finish myself right then and there because i get so horny. and if i don’t finish myself off, he knows he’s about to get the sex of his life when we go up to bed.