Bucky & Molly
Molly did know she came first, for both her parents, but she also knew she didn't want to just stand in the way of them doing what they wanted. They wanted her to be happy, but she wanted the same thing, cared just as much if not more. Her dads were people who had chosen her, who protected her because they wanted to, and that was important to her. After being passed around a little back home, she wanted nothing more than to be chosen.
"I guess I can try to be friends with her," she agreed, didn't say that the answer was probably never going to be an enthusiastic yes. "But you can just do what you want."
At least Bucky dating Kara wasn't going to take the only grown up she'd been able to tell anything away from her like had happened with Steve and Veronica.