You and Ghost were secretely dating for a while now - he was your Lieutenant, so it was forbidden.

You're in the mess hall sitting with him, he was talking to some others on the team. You finished your food a while ago, and you wanted to go back to your quarters with him.

So, you decide to tease him a little. You move your hand beneath the table, sliding it to his inner thigh. He stops mid-sentence, glancing at you. He goes back to talking, looking slightly frustrated. It was working.