On my latest playthrough, I decided to go all the way with her and see what happened ... ended up pissing me off a lot.
spoiler
If you make all the choices to be on her side all the way to the end, you'll eventually be carrying her to the space shuttle ... and then in comes fucking Reed to block your way. You have several dialog choices there, but only two possibilities: you give up and give her to Reed, or ... Reed shoots you in the head, you die, game over.
I really wanted to fight that motherfucker and have an awesome boss fight. It was one of the last quests I did, and with the build I had, I could probably take him no matter what. Hell, with the cyberware I had, I bet I could take him without putting Songbird down. But the game doesn't even let you try. Cutscene death, every time.