The right amount of naughty and innocent

"I've only had one cock so far and it wasn't this big," Rebecca says with a smile.
"I'm sure that you can manage."
"Absolutely. It will...just take time, Master."
"Take all the time you need," you reply with a smile.

She takes your cock in her mouth slowly, getting it wet.
She takes her time and gets every inch of it wet.
She shows enough experience to not require coaching, but also enough awkwardness to not make her feel 'too slutty.'

Not that there's anything wrong with that!
You just get plenty of that with her Aunt.

After about 10 minutes of this, you decide to give her some attention too.

She lays back on her bed and invites you to eat her pussy, accidentally revealing a toy under her pillow...

You happily accept and show what you've learned from Eva.
Rebecca is quite happy to be the beneficiary of this knowledge!

As you eat her out, she talks about her sexy friends and how much she wants to share them with you. You don't know if this is for real or just dirty talk- you also don't care.

You give her a nice orgasm and she asks you to fuck her.
You agree and tell her to pick a nice position.

Showing off her flexibility, she bends herself a bit with her legs and neck back while on her stomach. You take the invitation...

Moving into position, your hands go around front and grab her lovely breasts.
This also serves to hook her legs in that position, alleviating some pressure for her that way.

You enter her to a nice, long moan and begin to fuck her.

With her neck in position, you give long, lingering kisses to there, plus her face and lips when they present themselves.