Introduce some new rules

Matthew sped home, as quick as he could. His mother was a little concerned, until he reminded her that he had been given that special exception from traffic laws by the police and then she seemed completely at peace. Quickly his mind was racing, rationalizing. His mother's mind was completely malleable. If he told her she was a race horse, she'd probably let him climb on her back and ride her around the neighborhood. But he knew that he would be better off keeping this secret, so when they reached the house he quickly rushed her inside.

"Alright, mom. Get your clothes off." She looked at him in shock.

"Young man, I have no idea what you think is happening here, but-"

"Mom, you have a cold. Everybody knows that when you have a cold you need to strip down, just like you had me do when I was a kid." She looked at him embarassedly after a moment of confusion.

"I'm sorry, sweetie, I really must be sick. I'll just head up to my room then and get undressed."

"What do you mean, mom? There's nothing to be embarrassed about. We're naked around each other all the time."

"Of course, you're right. I'm just not myself today."

To Matthew's delight, his mother walked into the living room and begin taking off all her clothes. First came the shirt, revealing her bra-clad breasts, then her pants revealing her sweet ass in matching panties. Then, without any prompting she removed her underwear and stood in front of her son completely nude, without any shame. Matthew had snuck peeks at his mother before, but never before had he had the opportunity to inspect her in her full glory. Her breasts were full, but didn't sag much and her ass looked round and firm. She sat on the couch and he saw her vagina, with carefully trimmed pubic hair and full lips. He was immeditely erect. He only realized he had been staring when her voice broke him out of his trance.

"What are you looking at weirdo? Take those clothes off, make yourself at home."