Janet’s Stretching Marathon by Fokerz (Archive Link)
One of my favourite stories by fokerz follows Janet masturbating with her giant sex-toy, using her chain of huge six rubber balls to stretch her genitals to her absolute limit. Pushing herself further, she eventually manages to pack all of them inside her womb, and with her horny mind taking over, decides to get dressed and even walk around a bit in public, the giant sex-toys inside her constantly stimulating her further..