It was rough at first getting his size to slip inside, however the moment his pre started to lather her insides she slowly started to slide down more and more until he reached about as far as he did last time. Moaning wouldn't even describe the sounds and expression over her face as she felt she was being driven in half by the beast, gravity playing a part too on forcing her body to take even more. At one point she would feel her insides would nearly break, but with the smooth motions of sliding up and down her body slowly but surely was making room for the size. The strangest feeling and sight to both of them would be the sight of her belly slowly rising and falling as he adjusted his hips as she continued to slide inside of her. Tears building up as her body continued to forcibly make the adjustments; but finally after grinding and sliding he would get his prize of her being fully impaled on to him. She would undoubtedly be sore the next day, but her moans and her gushing juices of her open rose drowned out her worries regarding it. A few more rounds like this too and it probably wouldn't be long before he would be able to ride her just like any mare.