Just to throw my two penneth in consider this angle.....

You fecked a girl in one night.... Played, well done, sounds like this was your objective and you succeeded.

I have done the pof thing too, my ex was a serial fisher and would put out in the first night regularly. Me on the other hand took a couple of dates. I ended up being her first proper love and subsequent boyfriend. This from a girl who said implicitly that she didn't do relationships... In her eyes I was different to all the others, I sat back, my motive wasn't sex its was enjoying the moment with her.

Point is that even of your game Is at it very best your true motive will shine through. You wanted a shag and you got one, if your motive was to find a girlfriend then maybe you wouldn't have pursued sex on the first night and this would resonated more with her and the qualities she seeks from a boyfriend.

Your horney, you want sex and you're getting it......roll with it, enjoy the fruits and fuck anyone else's opinion.