Step-Dad Demands me to fuck my step-sister Addison in front of him

I have always enjoyed engaging in sexual activities with my step-sister, Addison. Everything was going smoothly until my step-father interrupted us, catching us in the act! He had been spying on us from inside the wardrobe, witnessing me and Addison on the verge of engaging in oral sex. Now, he insists on watching us have sex right in front of him.
It is unbelievable that my step-father simply watches as I engage in intercourse with my step-sister's intimate body. He instructs her to open her mouth and demands that I ejaculate into it for her to ingest. I am shocked by the obscene nature of our step-dad, who appears to be even more deviant than me!.