He agrees

Captain America looks at Superman and Supergirl for a moment and then lets out a slight sigh.

"Okay, okay," he says slowly. "Far be it for me to ruin the honour of Supergirl." As he speaks he pulls his phone out again, taping away at it, presumably deleting the photo on the phone.

Supergirl smiles at him, and you push ideas into her head, watching her walk over and plant a light kiss on his cheek. "Thank you," she says slowly, before re-joining the queue.