London. The bedroom in Crowley's Mayfair flat. Aziraphale and Crowley have been reminiscing about their last meeting atop the Eastern Gate of the Garden of Eden [Chapters 60 & 61 of The Big One], when they had discovered that angels and demons could touch one another without harm and Aziraphale had proceeded to massage the aching feet of Crawly's new human-like body. Things were just getting good when the pair were interrupted by incoming angels. They weren't able to meet again for a couple of millennia.
Aziraphale is seated on the edge of the bed, legs hanging over the side, as he and Crowley had sat atop the Eastern Gate wall.
Crowley, let me massage your feet again.
The demon scoots around until he's lying at right angles to the angel, feet in Aziraphale's lap, as they had done 6 millennia past.
Aziraphale spends a long delicious time stroking and massaging Crowley's ankle muscles, rubbing his toes. The demon visibly relaxes into jelly. When Aziraphale begins to massage Crowley's insteps, the demon starts to moan softly, just as he did 6 millennia past. Only this time no incoming squadron of mighty angels interrupts him and Aziraphale.
Ooooohh . . . Oooohhhh . . . Aziraphale, lie atop me.
The angel slides out from under Crowley's legs, runs his hands up the inside of Crowley's thighs and over his body, then holds himself lightly atop Crowley so their growing erections are paired. Crowley's twitches and spirals around Aziraphale's. Aziraphale lowers himself until his full weight is upon the demon.
Shall I levitate a bit, Crowley? I'm not too heavy?
Crowley clutches Aziraphale's back as a man falling off a cliff might clutch a handy tree.
No! It makes me feel safe. Flare your wings.
Aziraphale's snowy wings open, then fold to form a sort of tent over him and Crowley. His hands caress the demon's velvety fade, his open mouth delivers a passionate kiss that Crowley reciprocates. Crowley moans with pleasure as the tidal wave of Divine Ecstasy rolls over them and carries them away for hours in their own little cocoon.