Tommy was a man who demanded control in all aspects of his life, except for this, Alfie realized. Tommy gave up control here. He allows for this to happen, showing a side of himself that no one else saw, but only to Alfie. Only handing over control, to Alfie, in this one aspect of his life. Or The one where Tommy can finally admit to himself what he and Alfie do in secret is much more than just getting off. And it's finally time to address that. This is a one shot and is completed.