Nightmares were rather commonplace in the Tower, so it wasn't surprising for Tony when he heard someone walk into the library as he played the piano. It was a particularly hard night for the genius, memories of Howard and Mom blending with horrid images of the Chitauri. He had only gotten three hours of sleep before being rudely awakened. Tony never stops his rhythm, playing a song that reminds him of James: "I don't care what they say, I'm in love with you. They try to pull me away, but they don't know the truth. My heart's crippled by the vein that I keep on closing. You cut me open and I keep bleeding, keep, keep bleeding love..."
As he finished, James came over to him and wrapped his flesh and bone arm around Tony's waist. "What are you trying to say, dollface?" he asked, pressing a kiss into Tony's neck, resting his face there.
Tony shrugged lightly. "Not my fault a lot of people are ignorant of who we really are."
James hummed in agreement. "We have the Avengers to support us. But even more importantly, we have each other."
"Always," Tony confirmed before playing another song. His voice always calmed James after a nightmare/memory, just as James' presence soothed him in return.