Hmmm, I'd watch that one. Look how quickly it's grown between the taking of the first photo and the second one. If you ask me, I think it could be a Mojotriffidus maximus. They grow very quickly, need absolutely heaps of feeding and then invade the house and plonk themselves on one's lap. Be alert, it could take over the house.
It's not very green though, is it? Must be lacking in certain nutrients.
