TL;DR Already had sex with girl, 2nd night hanging out and she puts up LMR??

This has happened before but happened last night with a new plate. We met up last week and slept together on the second date (twice), so when I invited her over last night I said "Come over at 8pm I'll make us some drinks before we head out." The plan was to go to a dance party / rave thing at 10pm downtown so we had a lot of time to kill.

Poured some drinks, hanging out, push-pull yada yada. I recognize that the 2nd time you hook up with a girl you aren't necessarily at square 1 but you have to work the kino back up naturally and not jump into anything, but by 9:30 I'm teasing her and leading her to the bedroom and she keeps saying 'why don't we wait until later' and 'theres always more time'.

I don't understand this STR? I'm sure some of you have experienced it, how did you handle it? I largely ignored it, made sure I never seemed upset or butthurt about it, we went out and when we came back we had some extra rough sex, but by then I couldn't even finish because it was 1:30am, I was exhausted and had been drinking for 6 hours. THAT was why I wanted to bang one out before we left, but of course I couldn't say that (then or after the fact).