Heh, this is basically
THIS thread except the question is reversed. But basically my answer on that thread still applies here for the most part. Since I try to cum inside of my Newfie gal right after she has an orgasm herself, I'd imagine that she'd be feeling nothing but pure pleasure up until, and after, she cums. A shockwave of feel good brain chemicals such as dopamine, oxytocin, vasopressin, and endorphins will ensue. So pretty much the main thing going on in her head is likely to doggy equivalent of "OMG! Wow, does this feel good!!!" Afterwards we snuggle, cuddle, and kiss for about 20 minutes which she absolutely loves, she appears to go into a blissful trance like state of happiness. She's likely still riding the wave of feel good chemicals surging throughout her brain. Then to top it all off, I take her on a walk so that she can go pee. All in all, I'd say she's having one hell of a good time! Lol