even though both my sister and I are in our late teens.
Fuck off, yeah? You can barely move. It's a wonder you made it up to the house in the first place, and you make things awkward, when one of us has to come through and BABYSIT YOU at all times. Get the hint.
We shouldn't have to change our schedules for an 80 year old who keeps turning up for no reason, and who just sits in silence in the living room. You don't even announce that you're here, you just sit there, reading shitty celebrity gossip magazines you take out of a skip.