My GF has always been pretty cool, the sex is always rough, and she's fun to be around. The problem is her attitude toward certain sex acts. In the 3 months we were FWB, I've told her to give me a BJ twice, both times which she naggingly complied. They're not the biggest deal to me in terms of satisfaction, I just like them due to the dominance factor.

So, we recently entered a relationship and we hung out on her period. I told her to blow me, but she kept coming up with excuses so (I guess me breaking frame) I just deescalated and drove her home. The most recent time we hung out, she's not on her period anymore. She's really into it, I'm fingering her, and I try pushing her head down and say suck my dick. This is the most she's ever resisted. I was annoyed and withdrew attention, being on my phone for a bit. She then came back on to me, trying to cuddle and make out. I jokingly rejected at first but then pushed her head down again, just to get rejected a blow job twice. Then, I just gave in and had sex (frame slip).

I've seen that it could be a sign of lagging interest and me acting more beta, but she's obviously been into me and she came onto me when I withdraw attention. What gives?