I actually didn't mind it. Disclaimer: Maggie is my fav.
First time I saw it I went WTF and was pissed. Had a quick look at the coding and don't think you can pick her up later. So went back and did it.
On the second view, I started to see that it wasn't about femdom, but security. We don't know if Maggie has any sexual issue or mistrust of men. But growing up with the dick and then boarding school, it wouldn't be unusual. In all previous contact with her if you objectify her, slap her ass, or whistle, you lose points. It's not about finding her sexy, cause you can imagine her in lingerie and she likes it, you get points. It's the ones where you see her as an object.
Using the tie downs, even though MC could break them at anytime, gives her a sense of safety that allows her to open herself up to him. She wasn't using dominatrix language, like "shut up bitch, do what I say". It was more, "you like that". She's just as concerned with MC's pleasure as her own.
I don't think she would have done it, if she hadn't previously found MC's handcuffs, and thought he wanted it or at least like it. I don't expect (& really hope) that this is not going to be the normal sex with her. But if she comes out with whips and chains in the next lewd, I'm gonna run the other way.