You get a visitor

You are startled by a knock on the door. You make yourself decent and open the door. Standing in front of the door is your older sister, Sarah. She immediately sees the tears streaming down your face and she pulls you into a hug.

"What's wrong, Katherine? Did James do something to you?" You decide that if you could tell anyone about the incident with Robert, it would be your sister.

"No, Sarah. It was my fault. I... cheated on James." Sarah's jaw drops at your revelation. She stares at you like this for several seconds.

"I thought you loved, James."

"I do, I love him so much. I don't know why I did it. It's like I couldn't stop myself. The worst part is that it was with one of my students."

"YOU FUCKED A STUDENT?"

"Stop yelling, I'd rather not have the whole neighborhood know. I didn't actually fuck him. He fingered me and I sucked his cock."

"Wow, I thought I was the slutty one in the family." You glower at your sister. "I'm sorry, Katherine. I thought a little humor would lighten the mood."

"I ruined my marriage!"

"Hey, relax. Your marriage is not ruined, alright? Here, come sit down."