Jeff felt a hard surface under his feet, looking around and seeing the cave he had been in not a few hours ago, that same buck still sleeping from their last session. Eagerly rubbing his dick Jeff looked down at his currently male and human body. His arousal was already starting his change as his dick started to shrink again.
As Jeff watched his changing genitals the buck rose from it's slumber, sniffing the air for the scent of it's mate. Catching the scent on the still male Jeff the Buck trotted over to him. Jeff rubbed his mate as the buck started to lick Jeff's shrinking cock. Jeff moaning as his balls fully retreated and dick shrunk into the forming cleft. Jeff's doe hood had returned, and was already moving towards it's proper place.
Turning around and getting on all fours for her mate Jeff lifted her ass for the buck, her Vagina migrating quickly to it's proper position. The buck wasted no time, jumping on Jeff and penetrating her doe hood once more.
Jeff moaned as she felt her udder form, small breast buds forming on her chest as it shrunk down. Her feet changing into hooves as her stance settled into one that could either be upright or on all fours. Fur covered her lower body as Jeff and the buck continued to rut. Her ears pushed out as Jeff's tail formed and her nose changed, smelling the powerful scent of her mate Jeff nearly past out then and there. But pressing on she and the buck went at it as her change completed. Jeff lay on her arms as the buck settled on top of her, penis still in her vagina. For now they would rest as new life started to grow in Jeff's new womb.