Warning: this story contains bathroom fetish and scat. If you don't enjoy this sort of thing, then this may not be for you.
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Dianne left soon after breakfast to run some errands. In public she looked like any normal suburban mom driving around in a mini-van with her ear length blonde hair, white blouse and khaki shorts. She did have a huge rack and a big butt with a curvy waste, but was otherwise quite unassuming.
Mostly she was getting horned up for her afternoon with her son. She went to her stores and ran her errands and returned after a few hours in time for lunch.
Danny was sexually primed after his last day with his mother. He didn't beat off when she left, like he normally would, but worked outside in the yard, trying to hold his sexual energy until his mother was back.
Danny's mother came up the drive and saw her beautiful son sweating again in the sun.
"Hi honey! Can you help me get these groceries inside?"
"Sure Mom."
As Danny came to the car with his mother bent over getting the bags out he gave her plump ass a firm grab. Dianne jumped a little and handed her son the groceries. When they were inside Danny came up behind his mother and rubbed up his erection against her.
"Danny, I want to talk with you for a second." He continued rubbing up against his mom and rubbing her wide hips. "Come on baby, lets sit down at the table." Danny just wanted to hump right there, he didn't really understand.
"Danny, sweetie, I want you to know that I will do anything you want me to do. But you have to agree that everything we do is between you and me."
"Yeah Mom, I will keep it just between us."
"That means you can't squeeze my bottom in public, but you can do anything you want while its just us here."
"OK. That's fair- just between you and me Mom."
When she was convinced her son was earnest, she asked him what she really wanted to know.
"That's good, that's my sweetheart. So you have a big hard-on again. Did you masturbate while I was gone."
"No. I wanted to wait for you."
"Thank you sweetheart! I'll take good care of you. Now, did you fantasize about my big butt when I was gone?"
"Oh Mom, I love it. I can't stop thinking about it."
"And what were you thinking about?"
"I was thinking about how it smelled, and how I want to do what we did this morning, but without your panties."
"Mmmm. Yes, dear. I would love that."
"I want to lick up against your butt hole mom. Can we try that."
Dianne shivered imperceptibly, hearing this from her son. "Oh honey, I want you to lick my little shit hole for me. You can just bury your sweet little face in my fat ass."
Hearing his mother talk like this caused Danny to almost shoot his load right there. His mother had a little more self control, and tempered things a bit.
"I'm going to make us lunch now. You just sit right there and think about what you want to do with my big ass today." She got up and bent down to kiss her son's forehead, but he turned his lips to her and they met with a small kiss. Then they pressed their lips together harder and opened their mouths slightly. Danny felt his mother's long tongue shoot into his mouth. He shot back his good sized tongue. Dianne put her hand on her son's chin as they licked and rolled tongues, exchanging saliva. Then she stood up and turned around to get out the groceries and make lunch.
During an especially big lunch Dianne tried to settle things down a bit with regular conversation. Danny talked about his summer plans while his mother listened interestedly, occasionally asking questions. They finished eating at about the same time, practically stuffing themselves. This is just what Dianne planned.
She ripped a long, good fart.
"Oh, dear. I'm feeling so full. Do you want to come to the bathroom with me sweetheart?"
Danny's eyes perked up. He was feeling like he might need to go too.
"Yeah mom, but I gotta go too."