10th December

Vince had managed to shower and put his pajama into the washing machine without the girls noticing that it was all sticky and wet between his legs. After a quick breakfast the children went out to their castle to continue their work.

The tower was two meter high and very study. "Don't make the windows now. It will just weaken the tower and it might collapse." Instructed Miles when Tracy wanted to complete the first tower. Miles was the one who commanded where the snow had to be piled up and what they would have to do. He told Vince that he learned it from his father and they all together piled the snow to a hill nearly as high as the tower. Vince went back and forth dragging the big sled with snow helped by one of the girls while the others were flattening and pressing the snow again and again until the hill was so hard that they could walk on it without sinking in. At lunch time they were finished with piling up the snow and in the afternoon Miles instructed them how to form the hill into the shape of the later castle. While they formed the castled with Miles, Mia started the other towers. She carefully piled the snow on a circle to high towers that looked like the first one. One of them was even wider and she added a total of three more towers. "Looks good." Was the comment of Miles. "Today we will just finish the outline of the castle so we can start to dig the inside tomorrow." Vince worked as hard as the other kids and they were soon sweating inside their clothes.

When the sun started to go down she was half way through with all towers but there was still a lot of work to do. The kids did not notice the flow of time and only remembered that they had to go to dinner when it was too dark to see around the castle. Exhausted but also excited about their progress, the shape of the castle and the towers were done, the Purringtons walked home and Vince accompanied Tracy and Lilly again. They ate the stew hungrily and Lilly yawed a few times during dinner.

"You should not play so hard." Stacy laughed when she looked at the kids that all had problems to keep their eyes open. Even Vince was exhausted and was looking forward to his bed. He did not care about the girls seeing him undress. He just slipped out of his clothes and into his pajamas before cuddling himself into the cover. The girls did not notice it anyway because they already went to bed. Their mother had helped them to put on the nightshirts and before Vince even realized how he got from the table to the bed he already was tight asleep.

"Vince, wake up." He only had slept a few hours at most but it was completely dark outside now. Vince took a while before he opened his eyes and saw Stacy. "Are you okay or too tired to help Sarah?" she asked with a low voice. "I am okay. Please just give me a minute." He requested and rubbed his eyes. "We will wait in my room." Stacy left the room and Vince yawned. The short sleep had not been enough to fully recover but he got some energy back. In his head this actions with Sarah were some kind of sweet duty. He felt like the leader of a pack that had to breed all the cute females in heat.

"Good evening Vince." The soft voice of Sarah greeted him when he stepped into Stacy's room. "I am sorry to disturb your sleep. Judging from my kids the day was quite exhausting." - "It is okay Sarah." He said generously and already started to drop his pajama while he took in the air that was filled with Sarah's heat. "It should be my last day. I thank you for helping me this way." She said and crouched for him and showed off her pussy.

"It is my pleasure to help." Vince said when he started to lick her slick snatch. The taste and the scent of Sarah soon had him erect and hard and his knot started to form already. Stacy enjoyed the show just like the day before and masturbated herself while Vince slowly moved over Sarah and pushed in up to the forming knot. "It is the duty of a man to mate with the females in heat." He mumbled and picked up a steady rhythm. Both females moaned in unison with him. It took about ten minutes until Vince popped his knot in for the first time and painted the inside of Sarah's womb with his semen. But like the days before Vince did not leave it with the first orgasm. After his knot popped out the second time and Sarah cleaned his member Stacy also came close and caressed the head of Vince.

"We are so lucky that you went with the wrong bus Vince." She whispered. "It is also lucky that different species can rarely cross breed. It feels best when you are in heat to have a man come inside you." Vince moaned in pleasure from the muzzle job of Sarah and did not respond with more than a loving gaze towards Stacy. "Even though a part of me wished you were compatible." She added. "You are such a strong and virile stud and I know you will produce wonderful cubs." This flattering sent Vince over the edge and he released another orgasm inside the mouth of Sarah.

Vince pulled out of the muzzle of Sarah but instead of mounting the now presenting female he went to Stacy and pushed her back so she was lying on her back. "I also think that I got lucky with this. Else it would have taken years before I could experience this happiness." He mentioned before lining up his still erect and pumping dick with her snatch. She was a bit wet from her masturbating and the last spurts of his semen added slickness. "Wait Vince. I am not in heeee...." He pushed in. Stacy was incredible tight and not as much lubricated as before but Vince liked it nonetheless. Her snatch was not as hot as before but it was a different kind of sensation. Even though she protested her moans were talking for themselves. He pushed in and out until he managed to cram his knot in which earned a long groan from Stacy. Without the heat it seemed to be a bit more uncomfortable for her. "You will always be my first female." He huffed and licked over her dugs while he humped back and forth with small movements. His balls slapped against her tail hole and soon she started to moan again. They both held on for a long time until they joined in an unified orgasm that made them moan very loud. When Vince was resting on top of the belly of Stacy he saw Sarah masturbating hard. Her pussy was flowing in her juices and a bit of semen also dripped out. Vince felt mighty at this moment. He felt like he was the one in control and really was like the alpha male in a pack of feral wolfs.

When his knot popped out of Stacy he directly moved over to Sarah and took her in the same position. He just pushed inside her with his softening member and from the friction and the gripping tight walls of her pussy his member returned to life. During his mating this night he discovered a primal instinct inside himself that let him mate them not only for pleasure but by instinct.

When he fell into bed at midnight he was filled with satisfaction and the feeling of a job good done. Even though he had been more exhausted at the start in the end the two females were not much better off than him.