I don't think you should think about it as "rewarding her" for an answer lol that concept is a little strange to me. I would just go with a variation, something like "Good.
it'll go well with my dominant side.." or maybe something more subdued like "Good, I like a girl who knows how to have fun." Alternatively, you can soft close at the end of the second response if you want, it's a bit early but after if she agrees you can number close and vibe there.