You have Emma text Isabella later

When you get home that night you give your small-titted girlfriend Emma a very hard fuck. You slap and pinch her boobs until she screams out in pleasure/pain. After she cums you fill her pussy with your semen.

"That was amazing, John," Emma tells you.

You agree and give her a peck on the lips. Then you hand her her phone and tell her to text Isabella.

"Is that why you were so horny tonight, John?" Emma asks you. "You were thinking about Isabella? I saw how she had her tits on display tonight at the bar."

A good thing about having turned your girlfriend into a sex **** is that you can be more honest with her, so you told her the truth. You were severely turned on by Isabella and her big tits - and you want Emma to tell her friend just that.

Isabella had already snuck off to the bathroom in the apartment she shares with Jacob in order to masturbate thinking about you when she receives Emma's text.

"Want to know a secret," Emma texts to her friend.

"Yes!" Isabella replies immediately and then waits staring at the three dots on her phone.

"John told me he liked what you were wearing tonight."

Isabella just replied with an OMG face emoji.

"Your BIG tits got him real horny apparently," your girlfriend continues.

Isabella quickly texts a string of emojis with an eggplant a squirting emoji, and a girls face with a question mark at the end.

"lol", Emma replies. "Well, I thought I should say 'Thank you' since I was the one who reaped the rewards of your tit's hard work. He just gave me a fuck of a lifetime thanks to you."

"haha. What are friends for, Emma?" Isabella replies as she shoves her hand back down her shorts and begins to touch herself again, thinking again about fucking you.