It's a nice, quiet, Sunday afternoon.

Tony's down in the lab, working on God knows what, and you are...

Well, you were upstairs, writing a report for work, but you've gotten bored, and quite frankly, a little... Well...

You pad downstairs in your little ensemble of just one of his button ups and your most comfortable underwear.

After ensuring that he's not doing anything too dangerous to distract him from, you come up behind him, wrapping your arms around his shoulders.

You give him a little kiss to his neck.

Tony doesn't have to turn around to recognize the warm touch of those lips against his skin.

He's always been able to pick out your presence from the air in the room, even when you don't make a sound.

He lets out a soft hum, reaching back to rest a hand on your bare thigh.

"Busy." Tony says simply, head still turned to the project in front of him.