I would respond to that question with "How do you define 'accept'"?

"And, so how do you think I'm 'not accepting'"?

(I would've also tried very hard to not follow that up with "Whatever the eff that means".)

Meh. Sorry, I don't mean to diss your T but my former T used to do stuff like this in an attempt to sneak in ACT-ish stuff (that I'd expressly told her not to try on me). This stuff around acceptance and ultimately forgiveness is really very nuanced and has a strong spiritual / philosophical basis (without the roots of which, it becomes a banal edict of sorts) in the major Eastern traditions that it comes from (as I'm sure you're aware).

Unfortunately, it's gotten morphed into some mindless pablum and added to the ever-growing list of crap that Ts start practicing.

And, I'll stop my rant right about here -- apologies, if I'm way off base.