Something short to start. I want to develop this story deeply, but I'm still working on all the - what do you call them? - details.
"Homosexuality is a sin."
"I suppose we are very great sinners then."
"You may be. I have a wife and a son to go to. I do this for you."
"Then please, help me."
Severus opens the door to the Headmaster's office, his office, and finds a haggard Lucius outside.
"Severus."
"Lucius. Please come in. What brings you here?"
"Severus, I need to see my son. Please."
"You know I can't allow that, Lucius. The Dark Lord doesn't want anyone to visit the students anymore."
"I'm not anyone. I'm his father. I'm one of you, Severus. I don't object to the school but I do miss him." Lucius is close to tears. It is pitiable.
"Lucius, you look terrible."
"Thank you."
"Let's sit, and drink."
They do, on the couch that has so recently been Dumbledore's. They drink in silence for a long while, until Lucius finally speaks.
"He has taken everything from me. My house, my wand, my son. He makes advances at my wife…you do know I love her, right? Despite all this. She is very dear to me and the thought of losing her is horrifying."
"You will not lose Narcissa, Lucius, though you have lost other things. She is not a woman to be made a pawn of. I know your family is important, and Draco will return to you in no time at all. Once we have won, all that has been taken will be returned. As you once told me, there are sacrifices to be made. Do you think that it wasn't a sacrifice for me when Lily Evans died? That I did not reconsider my loyalty?"
"I wish I could believe it. I wish I could believe that it will all come back." Lucius turns more towards Severus, and he puts one hand on his shoulder. "I'm so…I…Severus?"
"Yes?"
"Will you please hold me?" This is said in a strangled whisper, barely audible. Lucius can't even look up.
"Oh yes. I thought maybe you would never ask."
Severus stands, and lifts Lucius up with him. He puts one arm around the older man, and walks him to the bedroom.