As June sobered up from her multiple orgasms she began to think about the implications of what had just happened to her. She felt herself full of mouse cum, and this made her nauseous. She never liked mice, and always hated Ty’s pet mouse Cheddar. She squeaked as Ty lifted up both her and Cheddar and placed them back in Cheddar’s cage. She was exhausted and laid down, spread out, as soon as her tiny paws touched the bedding. That’s when Ty got an idea. She felt pressure building inside her as her belly began to grow slowly but steadily, and her breathing quickened. Her sides began to balloon out gradually, her 8 small teats becoming flushed and swelling as milk built up in preparation for her coming litter. She began to rise up a bit off the cage floor as her belly expanded. Suddenly, she felt a weight on top of her as Cheddar mounted her again despite her obvious pregnancy. June squeaked as Cheddar squeezed her sides to hold on, then thrusted into her until her found her engorged entrance. June orgasmed and convulsed as Cheddar jackhammered away. She was too exhausted and too pregnant to move, but struggled against her mate until he reached down and bit her scruff as he pounded away, but as June grew below him he was forced to let go of her to keep going. Ty noticed as his thrusts became deeper and more deliberate, so he reached inside the cage to push Cheddar deeper into June using a couple fingers against his back. Then, the mouse spasmed as he finished, his cum oozing out of her with no place to go. June orgasmed again as he kept shooting his load inside her, emptying his huge balls. When he finally dismounted, he was panting and left to go curl up in his nest to sleep. June’s breathing became more shallow, her sides bulging out more and more. Ty stroked her back gently as she lay there, wishing this would hurry and come to an end. She could start to feel the babies wriggling around and moving inside her now, she had to be close. She squeaked loudly as Ty gently pressed on both of her sides with his thumb and forefinger, squeezing her slightly. He could feel the shapes of baby mice moving inside her. She looked nearly as if a whole other adult mouse was curled up in her belly. With a final squeeze from Ty, it was time. June started squeaking as her water broke and the first of many babies traveled down her canal as she pushed with all her might. It slid out neatly and immediately began writhing blindly on the floor, squeaking for its mother. As June started pushing out the next of her young, Ty used his finger to gently nudge the baby to June’s side. It felt her warmth and started crawling towards her to get under her. June felt a tiny mouth latch on to one of her many swollen and sore teats and begin suckling as the second baby was born. Ty nudged it closer to her and it began doing the same. This process continued until 18 babies were born, all of them fighting over June’s many nipples as she was unable to provide for all of them. She was fatigued, but happy to no longer be pregnant. June closed her eyes as her new babies nursed from her 8 teats, now beginning to fall asleep with all her young below her, that is until Cheddar returned and mounted her again. She was unable to struggle this time as he pounded away. Her mind drifted to bliss as she felt her mate fucking her again while all her nipples were sucked below her. He finished inside her again, plugging her with his waxy sperm plug to ensure another pregnancy as soon as possible, then left to clean himself while she lay limp.