My character vanishes one day. About a year later your character spots them out in public with a baby! How does your character react?
Darcy rubbed at her eyes, trying to will them in to working properly. The last week had been hell. She hadn't known what to expect, really. It wasn't like people kept anniversaries of when they're hearts got broken. But it was coming up on exactly one year since Bucky had walked out their front door and just never came back. Steve had put everything in to finding him, called in every favour, but there was nothing, no trace. He'd taken it badly, to say the least, and with it coming up to the year mark it felt like all those feelings were resurfacing. Nights were long, filled with them burying themselves in to each other, trying to forget and failing completely.
With her coffee in hand, Darcy moved down the street, dodging the flow of people with only a second off her normal reaction time. It was only when she bumped in to someone, wrenching her shoulder around, that she looked up, and froze completely. He was there, on the other side of the street, a...no, no way, that couldn't be right. She was seeing things. Because there was no way James Barnes - their James Barnes - was only a few feet away, baby curled up in his arms.
She didn't even realise she'd dropped the coffee and was moving until she was only an arms length away from him, hand reaching out for his back. He was right there, alive and well and...not theirs anymore. With half a stifled sob her hand dropped and she turned away, trying to push through the crowd, to get home, back to Steve, and pretend she hadn't seen anything at all.