Susan's sister texted her

Just as you're putting your clothes on after a nice fuck session, Susan looks down at her phone and sees that her younger sister has texted her.

"It's from my younger sister," Susan tells you as she reads the message. She smiles and replies to the text.

Over the course of the evening you have Susan tell you all about her sister. Her name is Michelle. She's been married for a year to a guy Susan doesn't, and has recently started trying to have a child. Susan show you photos of her sister, you can see the family resemblance clearly. Michelle looks like a shorter, perkier version of her older sister. She's hot, and you get especially turned on by looking at Michelle's wedding photos, which offered up an ample view of her cleavage. At some point Susan notices you have a boner.

"Do you need help with that, John?" Susan asks you. She begins unzipping your pants before you even nod. Second later your cock is engulfed by Susan's warm mouth.