Siblings Sex Continues, Then Another Trip to the Mall.

It was around one in the morning. Tuesday morning, when some noise woke me up.
"Fuck me, Brett! I'm your whore!" Ashley called out from the guest bedroom.
I knew they were fucking, and it got my cock hard.
"What was that?" Cristie asked after waking up.
"Yes, yes, fuck me! Fuck me!" Ashley called out from the guest bedroom.
"Someone is having some midnight delight," smiled Cristie.
"Do you want some midnight delight?" I asked.
"Thought you would never ask," Cristie said then flipped the covers off and got on her back. "This bitch is in heat, so I'm yours," she purred.
I got on top of her, and she guided my cock to her pussy.
"Oh yes, that's what I need," moaned Cristie.
I began pumping her pussy.
Then we heard Ashley's "I'M CUMMINGGGGG!" from the guest bedroom.
Cristie wrapped her arms around me and put her legs in the air bending them at the knees.