Hm... wellllll, I imagined Tessa having a "boy-friend-y" mum who leaves her to look after her little half-brother and sister a lot. I'm not sure how she'd meet Malik, but he'd probably comfort her with the "you don't need them" line and end up biting her. A little vague but I can fill in the details later. A little cliche, but it was the best I could come up with last night :D.
Ethan is probably un-employed. That's as far as I've got with him xD.