Cuckold fantasy fulfilled: he dominates me and worship my feet

It'd be easier to imagine this topsy turvy situation as a bit of a sadomasochist movie in which an old man gets to dote on his feet while his wife dominates him, but never forget lube, because honestly the whole colonization metaphor I can grok but the colonization of my anus would give me whiplash. He’s eager to please and satisfy his desire.