It could also be a guy. Your aliens have been acting all wacky lately, abducting in broad daylight an all.

If it's alien my money's on Frances (just because I'm dieing to see a Frances/alien hybrid).

But I'm still going with the "safe" bet and Jill. I don't see you "wasting" a good drama dump on a character that borders on secondary (like Stella and those). And PT would soil himself if his little girl was "in trouble".

Mmm, drama so good, like candy in my mouth.