He saw the way Tony looked at Gwen, eyes full of warmth and then sometimes a flash of something else. Sad. But only for a moment before it was gone. Steve didn't really understand, but he did know if anything bad happened to Gwen that everyone would be heartbroken. So he got her on his back and used all his strength to carry her home, which wasn't too hard considering what a little thing she was.
Once they were inside Steve sat Gwen on the couch and went into the bathroom, in the back of the cabinet behind his medicine was a little first aid kit and he brought it out and lay it on the couch.
"Okay, Nurse Gwen, are you ready to assist me in this VERY important operation?" Steve asked with all the mock-seriousness he could manage as he pulled on disposable gloves fives times too large.