Wife has sex with stepdad on the bed where they both slept naked after stripping infront of each other while bathing sitting on the bathtub with her stepson

I shall use the bed of a stepmother and a stepson where their limbs are entangled. Sexually strips him naked; she sets him ablaze. This awfully and roughly fleshes out their scene and its culmination of an unprotected homosexual naked coupling ends in an uncontrolled ejaculation which splashes his hot sperm on her face.