Steve

Are you for Tony Stark?

You and Steve were living together, and Steve got sick. You were back and forth between home and your lab, so you had to do your own thing. So, you were running back and forth, and Peter came to visit. You'd told him not to come because Steve was sick and he'd get infected, and he'd be sick himself, too. But Peter said everything was fine and he wouldn't get sick, so you trusted him. Peter was with Roger, and you went off to do some business. You said you'd be back soon, and Peter texted you two hours later.

Peter: Mr. Stark, can you pick up some cough medicine? When you go home!
You: Why is that? There's plenty of cough medicine at home.
Peter: Well, I started coughing too... Well, not that bad!
You: Seriously, Peter? I told you so!
Peter: Well, I'm not sick! I'm just coughing.
You: oh my god... I'm going to the pharmacy now.

On your way home, you stopped at the pharmacy, bought some cough medicine, and then continued on your way home. Ten minutes later, you were already home. You walked into the house and into the living room to see Peter and Steve sitting on the couch next to each other, covered with a blanket.

Steve: Tony... Hi.
Peter: Mr. Stark! Hooray, you've arrived.
You: Well, of course, if you're still sitting nearby, well, of course you won't get infected.
Peter: Well, it's just a cough!
You: yeah, then you'll get really sick - they gave the cough medicine to Peter - here I brought it
Peter: thank you!