cuckold by my virgin girlfriend part 4

A virgin's birthday present for her boyfriend's grandfather, part 1

It's been two months, and I've barely been able to see Carolina. We still text.
After that day, we spent a whole month looking at each other daily. She told me how she felt when they made her submissive. She became very good at sucking my penis. I came many times in her mouth, but little by little, we stopped seeing each other because of school, and Carolina was also a little weird.
One day I went to her house. A friend of hers was doing homework with her. When I knocked on her door, she came out.
Carolina: My parents aren't home, and I want to talk to you about something, love. Just so you understand, I'm going to make my friend leave.
She went into her house. I stood outside waiting. Almost 30 minutes passed, and her friend came out, a little sweaty. He greeted me and told me he'd be in. He didn't even put his things in his backpack, he was carrying them in his hand.
When I walked in, my mouth fell open.
Carolina was wearing only her school skirt, she didn't have a blouse on, not even a bra, and her hair was messy.
Carolina: I wanted to talk to you about this.
Very shocked, I said, "Carolina, what did you just do?"
Carolina: Juan, we've experienced cuckold sex, and I actually kinda like it. First with your grandfather, then with your friend and his brother... we can't see each other all the time because of my parents, so I'll be completely honest with you.
I was very nervous; my stomach was churning with anticipation.
Carolina: I want an open relationship. I'm really sorry. I love you very much, but I don't want to miss this.
I didn't know how to respond. I felt scared, and also regretful. I was the one who started this, and now Carolina has taken a liking to it. Now this was the consequence: accept it or end the relationship.
Me: What would this relationship be like from now on?
Carolina: I don't want to leave you. I really love you. It's just that sometimes I'm curious to know what it feels like to do what I do to you with other men. I want to be able to be with other men. We can have rules. Be with men you say you want. You can be there as long as you want.
We were silent for a moment, both cried a little, hugged, and forgave each other. After a few minutes, we established the rules.
Me: Rule number 1: It will only be casual. You can't be with someone you're attracted to in a non-sexual way. 2: You can't be with anyone more than three times in a row. 3: It will only be oral sex, and he can explore your body to the extent I allow. 4: I decide whether or not I want to see the sexual act.
Carolina: That's okay, my love. I love you so much. We can change them later, and for that, we both have to do it at the same time.
Me: Yes, my love, so be it.
Carolina: This time it was this guy. To be honest, he's come to my house 5 times to do chores. He's the only one I've ever been with. He's seen me completely naked, Juan, but no sex. I didn't even give him oral that day. He just masturbated while watching me naked. It was the third time. He's the only guy I've ever had in my room to do sexual things.
I got turned on when I heard that. He was the first guy to undress her and be in her room doing lewd things. Carolina gave me oral sex. I came a lot in her mouth. The only image I ever had of her and her friend came to mind. In the midst of ecstasy, I remembered something.
Me: Carolina, your birthday and my grandfather's are consecutive days. First my grandfather, then yours. If you want to do something, you can experiment with my grandfather as a gift.
The weekend would be both of our birthdays.
Carolina: Thank you, my love. Tomorrow I'll go tell your grandfather I'll give him a surprise.

The next chapter is going to be long, so it'll take me a while to write it. It's going to be much more exciting; it'll have two points of view: Juan's and Grandpa's.