Zack lowered one of his hands that was rubbing and massaging Melly's breasts to do the same to her belly and lower abdomen. He imagined himself with his sister seven or eight months into the future, laying in the very same position in a bed here or somewhere else, him positioned behind her rubbing and massaging her swelled pregnant belly and large puffy breasts filled with birth milk.
"Stop Zack, I mean it, I don't want that thing in my ass."
"Stop being so irrational sis we need to start being practical here" he chuckled lightly in between kissing the top of Melly's back and shoulders with the bulbous head of his thick rock hard cock still inserted snugly in his sisters tight neglected asshole. "We need to practice more anal sex so we're ready to go while you're pregnant, I think we were both too excited the first time we tried and both got off much too early"
Zack groaned feeling his cock getting thicker and harder every minute the head was lodged in his sisters ass. "How are you feeling sweetheart? You're a bit tight back there so I think to be safe we should use some more lube"
"Stop Zack, I mean it, I don't want that thing in my ass."
"Stop being so irrational sis we need to start being practical here" he chuckled lightly in between kissing the top of Melly's back and shoulders with the bulbous head of his thick rock hard cock still inserted snugly in his sisters tight neglected asshole. "We need to practice more anal sex so we're ready to go while you're pregnant, I think we were both too excited the first time we tried and both got off much too early"
Zack groaned feeling his cock getting thicker and harder every minute the head was lodged in his sisters ass. "How are you feeling sweetheart? You're a bit tight back there so I think to be safe we should use some more lube"