The latter part here is the important thing. She communicates it, and until she says otherwise, don't stop hammering or you'll frustrate her.

My ex wife just couldn't enjoy it, but tbh that's because she wasn't that into me. My girlfriend now just goes absolutely insane for it. There is a noticable physical accommodation difference in the two that I feel, and I guess the major difference is that she has a minimum arousal level before it's effortless for her. And that's both of us, its not great if Im not SSJ Blue and she's not lost her mind enough.