Jen and Claire went straight to the locker room, where they changed knowing that they would have to have a lot of energy since they would have a Physical Education class and soon after they would already have Cheer Practice. They wore their adapted swimsuit as they would be swimming, with Jen spitting out another pill while changing.
After they left the locker room, on the way to the pool, they started thinking about a way to get the teacher to take the pill but were surprised to hear a sound that seemed to be approaching them. When they looked in the direction of the sound they were surprised to see that Lucy was at school and running towards them, easily reaching them with the size of her giant steps. The giant dog girl jumped on them, knocking them on the floor face down and licking them happily.
Jen and Claire did not have enough strength to escape and in the whole lick Lucy ended up swallowing the pill. The conjoint cock-girls, noticed this worried about what kind of transformation she could go through since it had been something totally unexpected for them.
Soon Lucy stopped licking them, who immediately tried to get up to see what happened to the giantess, but couldn't, so they looked back as best they could just to see that she was not only shrinking quickly but the dog girl's face had merged with their ass, which quickly absorbed her entire head.
"Oops, now Lucy is going to be part of our body." Jen said
"Is what it seems. Who would have guessed that she would run away from home to come after us at school only to end up becoming part of us." Claire said when the dog girl's body finished shrinking, returning to the size it was before she became a giantess.
The transformation was not yet complete, as Lucy's arms were absorbed by her torso, which stretched a little. It was at that time that the cock-girls felt their nerves being connected and acquired control over the dog girl's body, except for the tail that, although they may feel it, was still under the control of its original owner. With that the transformation ended, then Jen and Claire looked at each other and saw that her ears had turned into dog ears.
Then they decided to check out the new body of cock-girls dog-girltaur, of which everything that came out of where their ass was before was the part of Lucy's body that had not been absorbed by their body. They could feel very well her 8 breasts that were now dangling loose, as well as her dogwood and vagina that were outside those that were now their hind legs, which were three feet behind the front ones.
They only realized the last detail of the transformation when they felt something moving in the vagina between her front legs, so they bent down and only then realized that her swimsuit had changed too, as it no longer had a bottom. They also saw that Lucy's eyes and nose were in their crotch, other than that their frontal vagina somehow functioned as a dog girl's mouth. At first glance the vagina was nothing different, until they saw that the different thing they felt before was one that they had a tongue in their pussy, which Lucy had control over and was licking their pussylips.
Soon they remembered the class and realized they were running late, so they went straight to the pool. They tried to ignore Lucy lambedo but failed because they had an erection, both their neck-shaft and the canine stick between their hind legs getting hard. Jen and Claire tried to avoid it, but they realized that with Lucy being in the mood they would not be able to stop, so they came when they were near the pool. They were sure that this was the most intense orgasm they had had since they arrived at school and for a second they forgot where they were, only after looking and seeing all the cum coming out of their mouths falling and mixing in the pool water.
After orgasm they looked around, as the other students in their class and the teacher were all present and could see everything, but nobody seemed to care as if nothing abnormal had happened. This time it went further, because their fucking had been enough to make all the water in the pool a little whitish and yet no one had any fear of getting in.
During the whole class they all stayed in the pool full of water mixed with cum and after class Jen and Claire went back to the locker room, now to put on their cheerleader uniform and go straight to the practice.