Relief and a dare
From Torg Adventure
Gasping to catch her breath, Mom said, "Oh, God, Ethan. Thank you. I just had to have a cock after your sister dared me to get myself off on the shower head until someone came to fuck me. I've been in here 20 minutes." She stretched, which made a little room between them. Then she turned around and Ethan got to see her tits for the first time. They were gorgeous, full and still perky with fat crinkled nipples on the tips. She smiled up at him but he couldn't take his eyes off her chest. He felt her hand stroke his shaft.
"Now, I need a little payback, dear. I dare you to go fuck Allison hard in the ass." She squeezed his cock, making him moan, before kissing him and pushing him out of the tub. Ethan took one last look at her breasts and grabbed a towel. He dried as he left the bathroom and walked toward Allison's door.
What next?