After their very enjoyable open-air fuck, Tricia and Simon agreed that role-playing would give them an outlet to explore other fantasies and sexual perversions without any guilt -- it was only acting after all!
"Simon, would you like to be my pretend grandson this Saturday?"
"Yes, without a doubt" Simon eagerly replied.
So, it was agreed that he would bring his 'costume' and she would wear an obscene mini skirt that barely covered her stocking tops. And, he added, a see-through blouse with no bra"
On Saturday, they sat down in the kitchen -- and smiled at each other and they were extremely horny. She because he had made a real effort -- short trousers, long socks, etc. He because her lovely fat jiggly belly was tightly encased in a short skirt and her chunky cellulite-riddled thighs in sheer stockings. And as a bonus, her lovely big titties sagged into her belly.
"It was good of your mother to send you round to help me with the laundry young Simon". With her various sets of underwear laid out on the table, she added "we need to sort out my knickers and bras. Fondling the gusset of a pair of skimpy knickers she said, "I'm not embarrassing you dear, am I?"
"No Gran, I rather enjoy it," he said, with a smirk on his face.
Stroking his legs, she added "Well it's all right if you do, granny understands these things, and all boys get a bit excited when looking a ladies frillies. In fact, if you didn't, I would say there might be a little problem and you know you should be experiencing erections, does that happen yet dear?"