Couldn't stay away from me again right?
The again is already implied by the fact she's saying he couldn't stay away and is therefore redundant. It's also quite an unnatural way of speaking. I would suggest something more along these lines:
"You just keep coming back don't you?" or "What a surprise; you just can't stay away..." or even "Does your boss/Do the others know how often you come down here to visit me?"
More attitude and more natural.
Your eyes never have any hate in them."
I'm sorry, but this sounds like dialogue from a bad soap opera. Suggestion:
"You play it up when the others are around, but I can tell you don't really hate me. I can see it in your eyes."
Heh, it's funny... sometimes I think you want to make sure I enjoy this to...
And again I think the dialogue feels unnatural. Suggestion:
"Heh, it's funny... if I didn't know better, I'd say you were trying to make sure I'm enjoying this too..."
Although I think this line is pretty ridiculous given the nature of Super Deepthroat. Samus would have to be a total masochist and her deepthroater would have to know that for him to ever expect her to enjoy the way she's being treated.
I'll force my way out of here when I get a chance, but I don't mind your visits anymore.
Again, it reads strangely. Suggestion:
"Your visits are the one thing I'll miss about this place once I've busted out."
I can feel your eyes on me... on my arms, my stomach. You like how I'm not some weak little girl don't you?
I like this line, but I think your emphasis is off, and the sentences are a little bit on the clunky side. Fix:
"I can feel your eyes on me; on my arms, my legs... my stomach. You like it that I'm not a weak little girl don't you?"
I know I'm still sweaty. Finished my work out before you came back
Okay, what? The above lines imply that Samus is being held hostage, and this line just doesn't gel with that at all. Rework it to reference that she's in captivity or remove it.
Hmhm, I can see you watching my breasts. I like it when you look.
Awkward dialogue. Suggestion:
"Do you like my breasts? I've seen you staring. Don't worry, I like the way you look at me."
I work out in here so I can stay strong. Hehe, and because I know you like seeing me all sweaty.
Another awkward line. People don't talk like this, and I can't imagine Samus giggling like that.
"You always seem to time your visits to match the end of my workouts. Don't think I haven't noticed. I know you like the way I look all covered in sweat."
Hah, I wonder when I started feeling good when you look at me like that.
Another clunky line. I don't think it works unless it's an inner monologue. Something like:
'What's wrong with me? I used to hate the way their eyes devoured me, but now... it makes me horny.'