Mom's home.

Around 5pm the two siblings were sitting in the living room watching TV when they heard the front door open and shut close. Their mother, Molly, smiled when she walked and saw her kids. They both got up and walked over to hug their mom. When Mark hugged Molly he felt a tightness in his pants. Blushing, he quickly released the hug to prevent his hardening dick from rub up against his mom. He was perplexed as to why he had that reaction because he had never thought about his mom that way before. If Mark had to guess he would assume there was a connection with the new way he viewed his sister and how similar Ashley and Molly were in appearance.

As Molly separated from her daughter's hug she turned to her two children with a quizzical look. When she had arrived home they had been peacefully watching TV together. She distinctly recalled that before she left for her business trip that her little hellions could hardly stand to be in the same room as one another. "Everything..." Molly slowly began, "alright with you two? You seem unusually...chummy." The two kids shared a look before breaking out into laughter.

"Yes, mom. Everything's fine." Ashley began.

"We just realized that everything was easier for the both of us if we got along." Mark explained.

Their mother looked at them both with a look of skepticism but ultimately seemed to accept their improved relationship.

"Mark, sweetie, I got some groceries on my way home, could you help me bring them inside?" His mother asked.

Mark agreed and after throwing on some shoes and a coat, followed his mother outside. Molly opened the trunk door to her SUV and bent over to reach the grocery bags inside. Marks eyes went wide as the act of his mother bending over caused her business skirt to tighten against her ass and cling to every curve. The young adult silently cursed himself as he couldn't take his eyes off his mother's ass and felt a familiar sensation in his pants. It took Molly standing up straight to snap Mark out of his trance and rush to grab the rest of the groceries. His dick still hadn't gone flaccid so blushing deeply, he held the grocery bags in front of his crotch to hide his stiff cock.

Back inside, he helped his mother unpack. Molly then threw a frozen pizza in the oven for herself and her kids and they decided they would watch some Christmas movies on TV that night.

As the family enjoyed pizza and watched Tim Allen struggle to take the place of Santa Claus, Ashley's phone binged. And after scanning the message for a minute, Mark's sister burst out laughing. Mark and Molly both questioned what was so funny and after calming herself down, Ashley explained. She told them about how her ex-friend Mari had been caught cheating on Ashley's ex and that the sex tape had been posted online and was spreading like wildfire. Mark was silently shocked. When he had sent the tape to Mari's boyfriend he had just expected him to dump the bitch. He had never anticipated that the dude would be vengeful enough to post the video online! This was even better than he had intended!