Two months later it was Kevin's 23rd birthday. As luck would have it, his birthday fell on a Saturday and Lisa woke up early so she could give her son a first thing in the morning blowjob. He was still asleep, but was laying on his side, back to her. She pouted but carefully rolled him onto his back. He didn't react, so she pulled the blanket down to reveal his semi hard cock. She slowly and quietly slid down the bed and got between his legs. She took his cock into her hand and licked the head, and gently stroked her son's tool until it was hard. She looked up at his sleeping face again and for the hundredth time was amazed how much he looked like his father before taking his cock into her mouth. Kevin didn't stay asleep for long. He realized his dream of his mother giving him one of her expert blowjobs wasn't a dream. He opened his eyes and looked down to see the real thing.
"Mornin' mom." he said, quickly waking up.
"Good morning baby. Happy birthday." Lisa said, before stuffing her son's cock back in her mouth.
"Best. Birthday. Present. Ever." he said.
"Oh, this isn't your birthday present." Lisa said, taking Kevin's cock out of her mouth and moving up to give him a good morning kiss. "I mean how many times have you woken up with your dick in my mouth? No, I've got something very special planned for you."
"What?" he asked, wrapping his arms around her.
"It's a surprise." Lisa said, grinning.
"Can you give me a hint?" he asked.
"Nope. No hints. You'll just have to wait."
He gave her a gentle slap on her ass, "Tease."
"Deal with it." she said, squirming a bit in his arms.
"I did tell you that some of the guys are coming by later tonight to take me out to celebrate, right?" he asked her.
"Yeah, I remember," she said, "And your grandparents want to stop by later this morning to drop off your presents as well. But right now, I want to fuck you."
Lisa sat up and grabbed her son's rigid pole and impaled herself on it. Moaning in pleasure as she felt her son's girth fill her up. Even after three months of getting fucked by Kevin, she still loved the feel of eight inches of cock working it's way deep into the warm embrace of her hungry cunt. It didn't matter if he slammed his cock into her or slowly eased into her, it always made her happy to know that this huge cock was all hers, and that she could have it anytime she wanted it.
Kevin also savored the feeling of his mother's warm pocket engulfing his stiff prick. Much like his mother, no matter how much he felt it, it always felt good knowing that no other man would ever get to experience this. She was all his, and that was just the way he wanted it. He didn't care if he never had another girlfriend. His mother would always take care of him. Emotionally and physically.
Lisa started riding her son's cock, slowly at first, looking down at him, beaming with pride. She loved her son so much, she had loved him since the day she found out she was pregnant, and every day since, but that was the normal love a mother felt for her son. This love was the carnal love that was supposed to be shared by lovers, not mother and son. But that didn't matter to Lisa, she wanted her son's cock buried deep inside her pussy. She had gone almost eight long years with her only sexual release being infrequent masturbation. She found what she'd been looking for in her son, and had been taking full advantage of it for the last three months. He was everything she wanted and needed. He was attentive, he loved her more than anything else in the world, and he was good in bed. It was almost like her late husband had been reincarnated in Kevin.
Kevin reached up and groped his mother's chest as she picked up the pace, moving faster and faster on Kevin's cock. Today was all about him. He was turning 23 and she had a very special present for him, but he wouldn't get it until later tonight. He wondered again what it was, but then pushed the thought aside as he caught the look on his mother's face. He knew that look, the first time he had noticed it, she told him how proud she was of the man he'd become. The man of the house. The man of her dreams. Her man.
She moaned as he gave her tits a gentle squeeze and braced herself on his chest and started riding him with wild abandon. She slammed all the way down and started gyrating her hips, grinding her clit into his hips as she did. Then she did something new, without moving she started contracting her pussy muscles around his cock.
"Mom, what the fuck...?"
She smiled down at him. "You like that?" she asked, Kevin could only nod silently. "That's something I've been dying to try. I've been... practicing. Think of that as a preview of your present. Don't move, let me do all the work."
She contracted her pussy around Kevin's cock again, and held it for several seconds and slowly moved up a few inches and then down again. Kevin groaned with pleasure as his mother released him. Not even his first time felt this good. His high school girlfriend Adrienne was an 18 year old virgin when they first fucked, and even she wasn't this tight. Lisa clamped down on Kevin and again moved up a few inches before sliding back down again and releasing him. Words failed Kevin as all he could do was moan and groan as his mother continued to tease him by contracting her pussy and moving a few inches at a time. She could only hold him for a few seconds, but she was planning to keep practicing so she could hold him for longer.
"Mom, that felt amazing." he finally managed to say. "What was that?"
"Like I said, a little something I've been wanting to try." Lisa said, "Honestly, I wasn't sure it was even going to work. Your cock is a lot thicker than my finger."
Then Lisa's phone rang. "Oh fuck, not now mother." she groaned as she looked over to see it was her mother calling.
She grunted in frustration as she pulled herself off Kevin's cock and scooped up her phone.
"Hi mom!" she said, suddenly cheerful. There was that ability to change her frame of mind at the drop of a hat again. "Of course, I was just about to jump in the shower. Give me about twenty minutes. I'll call you back once I get lazybones up. Well of course I let him sleep in, it's his birthday." She looked over at Kevin and winked. "Ok mom, love you. See you soon."
"Grandma has excellent timing." Kevin said, laughing as Lisa sighed in frustration.