Lol I think cause the manga had been very un-focused on eroticism till now this girl's sudden bdsm fantasy had me clutching my pearls! I was like, girl get some help!! xDDear god Marie should go to priests, monks, healers and representatives of any other religion to get some cleansing, there is something haunting her (a perv who'll probably show up again).
I wonder if the imagery comes from jobs she did (like works in BDSM places, like the professional mistresses and stuff — by the delusions, she'd probably offer herself as a prop).