Bound By Desire : Night Woman Superhero Erotica Book 4 (Anal Sex Erotica BDSM Erotica Fantastical Erotica) - Superhero Erotica, #4

Night Woman battles the criminal underworld of her city with expert combat and detective skills, backed by her billionaire fortune, but even superheroes have to unwind. Night Woman's tonic is to play sub to her butler Albert in a role reversal that sees Albert go too far, sliding himself into a tightness where he doesn't belong.  But when a mystery superheroine ventures into their underground cave during a BDSM session, Night Woman is left with a host of questions, the first of which is: Would you like to join us?