The twins anxiously followed their parents into the guest bedroom. They didn't know what to expect. They both suspected that they were about to become very intimate with each other. They also suspected that this would be an embarrassing encounter. Mr. Robinson closed the door and cleared his throat.
"Alex and Melissa. Both of you are going to do exactly as your mother and I say, no matter how embarrassing it might be. For now, I need both of you to take off your clothes. All of them."
The twins looked at each other helplessly. Alex slowly pulled off his T-shirt. Melissa looked at Alex for support, and then removed her shirt. Alex stuck his thumbs in the waistband of his basketball shorts. He took a deep breath, and then dropped his shorts to the floor and stepped out of them. He suddenly felt vulnerable. He needed his sister's support. He nodded to Melissa, who was shaking with nervousness as she unsnapped her jeans. She pushed her jeans down her legs and stepped out of them. Alex stepped closer to Melissa. The twins knew what they were expected to do next, but neither wanted to do it. They looked imploringly at their parents, but Mrs. Robinson only nodded in support of her husband.
Alex became painfully aware of the erection that had involuntarily formed, and that was now pushing his briefs outward. He decided that he might as well get the embarrassment over with. Alex quickly jerked his underwear to the floor and kicked them off his ankle. He stood there with his cock fully erect. Melissa gazed at his cock in amazement. It took all of her considerable self-restraint not to smile. Alex noticed his parents looking at it too. Suddenly, his self-confidence vanished. He felt much more comfortable with his sister seeing him naked than his parents. He stepped back and stood behind Melissa. Mrs. Robinson shook her head disapprovingly.
"Don't even try to hide. We all saw your erection. Now come out from behind your sister and walk over to me. Melissa, stop standing there and get your bra and panties off right now."
Alex thought he was going to die as he walked right up to his mother. Alex gasped as Mrs. Robinson's right hand grabbed his erect cock around the shaft.
"Yes, I know this feels good, Alex. Your sister is going to make it feel even better. I am going to teach you how to use this to make your sister feel good too. That is, if your sister will quit playing shy and get naked this instant! Alex dear, you have a really wonderful penis. It's been a long time since I have seen it. It's so young and firm. You are going to make your sister so happy. Melissa! Stop wasting time. You are going to get naked. We can do this the easy way, or the hard way."