You aren't sure

"I guess I don't know what to think about it," you say slowly. "I mean, it's a little embarassing that you were talking about my penis size with mommy, and that she is going to give you pointers to improve our sex life. What do you think she has in mind?"

Rebeccah smiles reassuringly.

"I don't know what she has in mind, but it makes me feel reassured that she has experience with this kind of thing. I'm really curious what kind of things she and daddy did to improve their sex life."

"By the way, you are so cute when you're embarassed. Your cheeks and ears turn bright red and you look so bashful!" Rebeccah says sweetly. "Come here, you don't have to be embarassed."

Rebeccah pulls you into a hug and presses your cheek into her chest. You guiltily think about how much bigger and softer her mother's breasts are and your penis twitches in your panties.

A few moments of this, and Rebeccah's mother calls you to the kitchen for the evening meal.

Dinner is flawlessly prepared and delicious. Afterward, you offer to help with the dishes, but Rebeccah's mother shoos you away and suggests you and Rebeccah get ready for bed and come back downstairs for some hot chocolate and screen time.

In your bedroom it dawns on you what getting ready for bed entails. You will be expected to appear downstairs in a nighty. You go to your dresser and pick the one that offends you the least, and after shedding your clothes, slip it over your head. You realize it's rather short, just barely covering your panties, so you pick a different one, but they are all the same length.