He reaches back without hesitation, taking her hand in his and pressing her fingers with achingly gentle care.

At the other end of the couch, Natasha gives a small, privately satisfied smile, and gets up to go refill her ice cream dish. When she comes back, she catches his eye before pointedly moving to another one of the chairs, a little nearer Tony and Sam's ever-more-animated conversation.

Bucky squeezes Sharon's hand again, then leaves his seat in order to come sit on the sofa beside her.