"That's not how it works, dum-dum," Lexi said.
"That's Daddy dum-dum to you," Austin said.
Later, when they were both naked, Austin's body shining with sweat. His dick dripping with his sister's juices. Lexi screamed out, "My brother is fucking me so good!"
"Yay!" she heard Molly call out faintly.
"Give it to her...