I think that right now, Bucky and Natasha are at the same point in their relationship that Bobbi and Clint were at the end of Widowmaker -- they're not together, but they're still close, and they both acknowledged that the feelings were still there, but it just wasn't the right time. It's basically up to whichever creative team comes next to decide what they want to do with the characters. In Bobbi and Clint's case, Clint was picked up by Fraction, who turned him into the kind of person who doesn't really do relationships, and he hasn't quite recovered from that. Kelly Thompson is still writing Natasha for at least another arc or two, and the vibe I got from this arc was that she doesn't want to write Nat in a romantic relationship right now. (Not to mention the fact that she said something in an interview a few days ago implying that she didn't want to tie Natasha exclusively to either Bucky or Clint.) We'll see what happens 1-3 years down the line.
I'm pretty sure she was talking about the baby, not the guy (or at least not independently of his relationship to her via the baby). Although they didn't acknowledge the fact that Natasha had a stillborn daughter back in the 40s and that she still thinks about her.