She screams

Your brother’s wife pulls back from your kiss.

Screams.

Scrambles off the bed. Off of your brother’s hard cock. Away from your groping hand. Her eyes full of fear. Her brain sending one signal to her body “Run away”.

You get a nice view of her big swaying, bouncing tits and she scoots herself away on the floor. She tries to cover them up with her arms but they’re too big to hide.

She finally recognizes it’s you. Her breathing slows, “What are you doing!?”

You point to your brother, “He invited me. He thought you wanted some spice and variety in the bedroom.”

Her eyes shoot to her husband, who is too stunned by my actions to speak. “You didn’t even ask me first?”

“Uhhhh…” is all he can manage. His dick throbs and now he has blue balls. They’re only one thing on his mind: cumming. He can’t bullshit.

I speak for him, “Would you have said ‘Yes’ if he asked you if I could join?”

Sex sweaty, hair messy, pussy dripping, nipples hard, my sister-in-law looks at me.