They seem like a match made in heaven, she is a nympho on the search for the one guy who can satisfy her and he has the stamnia and devotion to make her dream come true (and not only her dream comes in this case)...
Considering his initial image of her, I don't think many would mind at all even if her personality was like that.
But still, considering she just cut out the previous guy, makes me wonder when she'll just up and decide to cut this poor fellow out.
As I see it the previous guy just met her and didn't fullfill her excpectaions so she dumped him right away. The main character on the other hand has the divine stamnia of every hentai protagonist so she'll never be able to leave him...