It all began from an idea-1

Sandie then slowly peeled down her panties, allowing them to see her shaven pussy lips. Turning to Bob, She said “Time for your injection!” as she stepped out of her panties; she stepped up onto Bob’s bed and began to rub his prick along the groove of her cunt. Once his prick was wet with her cunt juice, she held it at its base and lowered her cunt lips over its head. She was now breathing much quicker and as each inch of the rock hard prick disappeared into her cunt he squealed her delight.

She looked at Bob as she said “Now we must keep this up until you have received the required dosage”. Bob could only nod. As she rode his prick Bob placed his hands on her great tits, squeezing the flesh until his fingers found the rock hard nipples. He began pinching them lightly between his forefinger and thumb. Sandie began to ride Bob’s cock in earnest and began emitting low groans from deep within her throat. As her pace increased so did the vocal levels. Suddenly she plunged down and shuddered as her first orgasm overtook her.