Put on a show

Mark took out his phone and texted Stephanie while Cate still worked on his rod.
"Steph, noone better see you! But you better keep watching. I want pictures of tonight."

Mark laughed as he watched his wife reluctantly try and hide and peek around a corner with her phone.
So subservient, it was almost like it was in her ice queen veins the whole time. Waiting for him to unlock it.
"I can't wait to show the girls this dick! First though, it's going in me!" Cate shouted, breaking Mark from his thoughts on Stephanie.
"Let me fill that pussy out before your friends get here and want a turn!" Mark said excitedly. Cate looked at Mark and said in almost a whisper " do you think Steph will hate me? Maybe we shouldn't...wait..I'm not..." Mark wasn't listening as he lowered Cate back and pressed his cock at her entrance. Then slowly began to slide into her "wait....I...oh man..." She laid back as Mark filled her. Stephanie watched in terror, her little sister was getting fucked by her husband.

Then, Cate's two friends burst through the door.