Then, it's a really alternative life because I'm sure in the first time line he doesn't have any son or daughter.
In this AU he knows his son and he saw him grow and raised him with the mother of the kid so right now I'm confused...
I highly doubt the mother is his ex wife, it just doesn't make any sense for me.

WTF??

I honestly don't think we'll find out who the mother is, but I love David! I hope we get to see more of him <3

When I saw that kid sitting at the steps of the school I was like, "OMG! That's his kid?!' Then it was and the donkey wheel in my head was whirling: "What? Wait. Who's the mom? Is it Sarah? No. Juliet? Ahhhh!" I thought it was a great way for Jack to work out his daddy issues- to bad Island Jack isn't so lucky- and the scene with Jack and David at the end was tuggin' at my heartstrings, for sure. I love Matthew Fox!

I loved the fact that he had a son! =)) And I loved David. It was so unusual to see Jack like a father! I hope they'll show us who's his mother.

And who is his mother??

Oh and I forgot to mention that Jack was such a hottie in flashsideways! ^^ =P

Loved that!
But I`m dying to know who`s his mom!

Let's a quick "subject-verb" agreement lesson :). To say "Jack have a son" there would have to be more than one Jack, so to put it correctly you'd have to say "Jack has a son"
like you don't say "He have a son", you say "He has a son."
or when the subject actually is plural you don't say "They has a son.", you say "They have a son."
Anyway, you're probably either not a native English speaker or made a quick typo so it isn't that important, but maybe you learned something? Yes I know I'm anal and annoying and y'all are probably pissed at me. :(

Anyway I love David, I thought he was awesome and i really want to know who his mom is!

I wasn't shocked because I already knew he was gunna have a son (damn those spoilers!) but I seriously want to know who his mother is.

I loved it! For some reason Jack having a son just fit. He seems like the kind of guy who should have a kid and I thought their scenes together were adorable! It was making my dad all teary eyed when he was watching. Hehehe. I don't care so much about the mom, but I'm intrigued.

I think It's obvious that it's Sarah(The Nuke changed a lot of things)so she might have not given him the"u'll always have sumthin' to fix"and leave him.

OMG i freaked out when i realized it was his son! i was like wait, did i miss something?! and omg his son looks just like him! lol and well im loving this son storyline cuz i love thier relationship and that moment they had outside of his recital was SOOO sweet! but gahh im dying to kno who the mom is too! it couldnt be sarah cuz they got married and divorced 3 years b4 the plane crash and Davids waay to old to be her kid. but idk maybe its juliet? ahh idk

I was like WOW! Amazing SL for Jack.