lesbian couple fantasizes about brother

[MindNymph]

The lesbian couple started thinking about incest(don't remember how). Initially it was restricted to fantasizing and roleplaying about the 2nd women's imaginary brother. Slowly however they started thinking about the 1st ones actual brother, don't remember his name. At start they were horrified about fantasizing about the real brother but slowly came about to it. I'm pretty sure they started referring to him as master in their fantasies. The story ended with them tied up waiting for him I think. There was no actual sex either the brother