She wants the control, so not long...

Maria didn't want to take any chances of Ultramom trying to escape once the triplets were born, so she decided to make this fuck a 'wham, bam, thank you mam' fuck. Grabbing her pregnant partners hips, she started out slowly, wanting to give Ultramom the fear of another long drawn out fuck.

Ultramom turned to her with a face full of fear before Maria smiled at her and ramped up the pace, her big balls smacking hard into Ultramom's balls over and over again, Ultramom was relieved when she felt Maria speed up as she didn't seem to have the energy for a long fuck session. She was plotting her escape route on a daily basis, trying to find some way to contact her son.

Maria meanwhile was trying hard not to laugh as she sped up even more, her hips becoming a blur as she heard Ultramom whimper as she tried to cum but her chastity cage prevented her from doing so. Maria groaned as she started to feel her balls pulling up into her body, with one last deep thrust Maria pushed her cock all the way in.

"Take this Ultramom!"

Ultramom wailed as she felt Maria's hot sticky cum entering her body, before moaning and whimpering as she felt something different, like her brain was being reprogrammed or something, it was getting harder for her to think about anything but Maria, serving Maria and obeying every instruction that Maria had for her. Her eyes glazed over before coming back into focus. Any thoughts of her son rescuing her were long gone, she was now hopelessly devoted to her Mistress Maria.