[ He tightens the chain a little bit, perking her breasts up, and makes to link it together to pull them close toward and above, tugging on her nipples the whole time. He's quite gentle, but... ]

Mmmm. I'm not sure how much that constitutes a slut at that point though. Maybe it's that the whole image seems too wholesome in my head. I might have the wrong sort of vibe. Or it could be a more philosophical sluttery.