Oh wow major spoiler theory:

The girl called Ellie (blonde chick with the gun) is familiar to Daniel. And we know that Ms. Hawkings has not had her first name revealed soooooo...Ellie is his mom. Mogod.

and going off that, couldn't widmore and ellie have got it on and made a child? dun dun dun

or maybe 2...one called Penny and one called Daniel...