"Ah, ah, ah... no... can't... ah, ah, ah... can't do it... ha..." Betty finally spoke again, but her words were no longer addressing"you."
When I heard the first part, I thought it was just the two words 'can't do,' thinking Betty was still rejecting Michael. But it wasn't until the end that I realized she was saying "can't do it anymore."
After those words, Betty suddenly arched her back, and Michael, moving forward at just the right moment, met her in opposite motion, his penis fully entering her as he had to pause due to Betty's sudden arching.
Betty's body started trembling, her upper body forming an arc, making her breasts appear even more prominent and perky.
At this moment, Michael's hands moved up to Betty's chest, as she arched back, allowing him free reign over her breasts. Betty's climax was even more intense than the first, and when it subsided, she was left completely drained.