Steve | Bruce
In our Universe it was Thaddeus Ross, her Father.
How it happened is...convoluted and very much involved him being dead, reincarnated, and turned against you because he hated you more than anyone else in life. Eventually, and I'm not entirely how this came to pass. He came back as the Red Hulk.
As for Betty[...] I won't lie to your Bruce. That did happen, and in much the same way, though how she came to die and be reborn aren't answers I have for you.
If it's any consolation, you two worked quite well as a team together for some time.