As Eileen had promised, it wasn't long before she returned. As soon as her husband took off for his week-long business trip, she rounded up her two daughters and ran right over to Ty's house.
Ty had just finished cleaning up from breakfast when he heard the doorbell ring. Answering it, he found Eileen and two girls, one teenage and one in her 20s, standing at his door wearing nothing but their nightgowns.
"Hello, Ty. These are my girls, Amanda and Clover. Amanda's the one with blond highlights, and Clover has long red hair and the poutiest lips you'll ever see on a girl in your life. I told them about your sexual prowess, and now they want to join in on the fun. Question is, are you?"
Ty had been expecting this, so he took them downstairs to his basement, which he had spent the better part of the last three days cleaning up, tossing out any useless junk he didn't want, and throwing the rest in the garage or upstairs in the attic.
"So ladies, it'll take me a while to get ready. There are some blankets in the corner, so get set up."
He then excused himself and went to the bathroom. Once again, he stared at the mirror and willing himself to say the words "Half horse".
Once again, he felt his body shooting up like a weed. Thick, black horsehair covered every inch of his skin as the muscles in his chest, arms, hands, and upper torso bulked up. A long black tail emerged from his backside, his legs bent back, and his feet and toes merged to form black hooves. He could feel his neck lengthening, his face extending into a muzzle, his teeth flatting out, his hair growing down his back into a mane, and his eyes and ears moving apart from his head. And finally, his penis grew into a hardened log, protected by a layered sheath, with balls so big they almost hit the floor. Ty the pasty 15-year old was gone. Ty the anthro horse was in the house.
The moment he descended down the stairs, he knew how things were going to go down. He was so aroused by the scent of the three females spread out before him that pre-cum practically flowed out of his penis like a river, moistening the wooden steps. For their part, the women stared at him with undisguised looks of horniness the moment they saw how well-endowed he was. They practically ripped their gowns to pieces to show off their naked bodies, letting Ty decide who would go first.
"Eileen, why don't you take the lead? Get me off so I can transform all of you."
Obeying his commands, Eileen got to work licking and sucking on his tip, using her boobs to rub his length. Ty began to whine, then let out a cry as semen shot out of his penis.
"Come on, girls. Drink up!"
The three then took turns sucking Ty's head, slurping his cum like a giant drinking straw. Just as Ty felt his balls were completely empty, the changes started.
Once again, Eileen became a beautiful horse-woman, with brilliant white hair and a mane. Amanda and Clover followed suit, with the former becoming a yellow riding horse and the latter a fiery red beauty with a thick muzzle.
"Mother, look! We're horses!"
"I know, my darlings. Now let's explore our bodies. Ty, fill up your balls. Girls, get him hard."
Ty wished that his balls would be full again as the girls put their hairy, but still soft hands on his cock. After just a few motions, he was hard once again.
"Raise him up. Amanda, give him a kiss. Clover, rim job. And as for you, big boy...stick it in."
Her pussy did look inviting. Ty inserted his cock while Amanda grabbed his muzzle and forced her tongue into his mouth. Meanwhile, Clover raised his tail and put her tongue to his asshole, wetting it before sticking in two of her fingers.
"How you like getting penetrated, stud. Let's clean you out."
Unable to move out of sheer pleasure, Ty let his mind wander the great expanse of his body. Amanda? He was never really into oral, but damn, did she have a plump tongue. Eileen? He was gonna cum any second. And Clover? Oh no, the feeling was getting to him...he was going to shit on her!
But Clover must have noticed, because she suddenly pulled out and used a towel to catch his dung as it slowly fell out. Wrapping up the unpleasant package and tossing it aside, she resumed penetration.
Ty couldn't take it anymore. He shoved Amanda aside at the very moment that he reached climax, pumping Eileen full of horse jizz.
Afterwards, he did the same to Amanda and Clover. When all was said and done, he reversed the changes, restoring them to their human bodies. Everyone was panting and out of breath.
"So, I guess I'll see you ladies..."
"Not so fast."
Eileen grabbed his arm. It was then that noticed something: all three women were visibly pregnant.
"Looks like we're going to give you some nice, healthy foals, Ty. Hope you're ready to be a father."