You couldn't decide whether to have sex with the shemale, or the cuntboy, so you proposed on doing a threesome with both them to pay for both the water bill, and the taxi fee. Both of them agreed, as the shemale got out a bottle of lube, while giving some to both you, and the cuntboy, as you rubbed some on your penis before starting.
First you see the shemale shove her penis into the cuntboy's pussy, as they both began to moan by how magnificent each other felt. You sit down in a chair with your penis hanging out, and soon discover that the cuntboy was becoming more feminine as you saw that his face became female with thin eyebrows, and a small nose. You also saw his hair get longer, while the shemale was fucking her, and some of her body hair began to fall off. The final changes were the woman's butt, and breasts which grew, as the shemale came in her pussy.