Anakin didn't kill his wife. She died following child birth. Anakin had completely turned to the dark side before she died.
Actually that is somewhat inaccurate. She did die because of Anakin. After the confrontation when she found out who he really was she lost a will to live. Doctors couldn't explain why she was dieing but she died but she died because of him. When the doctors knew she was dieing the performed an emergency surgery to give birth to the kids. So she did not die due to the child birth
As I said before, TFA purposely tried to make you think it could be either Hans or Luke. When I watched it a second time I was actually more convinced it was Hans. But you will be convinced more each time you watch it of your opinion because that's what they intended to happen. But I did noticed this time that when Maz talked to her, she said to Rey when refering to who she was waiting for "those you are waiting for will not come back, but someone else will, Luke will". To me that statement is saying that who she was waiting for (her father) was not coming back (Hans died on the mission) but someone else will (Luke comes back to help...as was implied at end of movie). So the statement suggest that Luke is not her father. Also, I watched episode 3 last night, and a lot of what happens in that episode suggest that it should not be Luke.
They can easily go with either story if you watch TFA in a vacuum. But like I said, we become convinced of one story and we ignore the clues for the other. Licasfilms did this on purpose. There is no way they would have 100% given it away in this film. So anybody that says to that end is blind to any other possibilities. I thought they did an artful job of doing that, making it 100% possible with either storyline. Some claim one would be farfetched, but I certainly don't think either is if you flow the clues closely
One story line I was thinking about was that when Kylo went to the dark side and Hans left, maybe leia was pregnant. Possible Hans didn't know about his daughter and leia hid her just like yoda and Ben his the twins. I still think it's possible Hans did know about her, there was a couple scenes in the movie where I felt like he did know, but maybe (if she is his son) it was just that instinct that somehow he just knew. Could also make a connection why Hans is in next movie, something to do with Rey and people telling her about him
The light saber calling Rey also could be a sign for being lukes daughter , but nothing from a past film has ever suggested that connection (in fact some could argue quite the contrary). Let's not forget that a Jedi has great vision, so one could argue that her power was calling to her. Amc technically, even if she was Hans daughter, one could argue that since it makes her direct line of darth Vader that this is the reason it called to her. (Note - I believe the only Jedi we know of to have kids was Anakin, and this was the direct result of him going to the dark side. If Luke had kids, some would argue the same should have happened to him, especially if they went as bad as they did, but that would be a strange and frankly poor script if that is what happened to Luke - to go to dark side - so to me it makes that story less likely. But again that's because I read the clues they laid out one way as opposed to the other).
