Bucky & Natasha
Natasha hoped for Bucky's sake that it would be what he needed to, he'd finally managed to find his own happiness and Natasha didn't want anything to ruin that.
"I will definitely be your obnoxious warning alarm" she promised, "You know people would not mind if you held back a bit, it's gotta be fun for you too" Natasha added, because she didn't want him to feel obligated.