The Invitation

Before Jack could open his mouth to protest that there was no way that he was going to go around dressed in women's underwear and sporting a pair of fake (but rather realistic looking) breasts she gently squeezed his semi-tumescent cock and the sensation caused the words to die on his lips. He could feel the pre-cum leaking from his penis again and looking down between his breasts Jack watched as Sally milked his cock, making the damp spot grow.
"He does seem to be enjoying it quite a lot, doesn't he?" chipped in Lucy.
"Yes he does," Sally agreed.
“May I?” asked Lucy.

“Be my guest,” Sally replied, making room for her friend. As Sally slid out of the way Lucy leaned over and squeezed Jack’s now once again rock hard cock through his knickers.
“Nice. You’re really hard, Jack. And wet.” As she spoke Lucy slipped on finder under the tented waist band of the sheer black knickers and rubbed the tip of his cock with the tip of her finger, spreading the pre-cum around his partly retracted foreskin. Jack shuddered at her touch. Lucy withdrew her finger and popped it in her mouth.
“Nice,” she commented. “Very tasty.”
Sally leaned forward again and hooked her fingers into the waistband of the knickers. She began to slowly pull them down, causing Jack’s cock to slap against his stomach as it was pulled down by the knickers and then suddenly released. Lower and lower Sally pulled the knickers, sliding them across the sheer nylon of Jack’s stockings and driving him nearly wild with sensation. Finally they reached his ankles and he felt Sally raise his left foot, leaving the wispy garment still on his right ankle.
“OK. Now I think we had better make sure that we use plenty of lube, it being your first time and everything,” Sally said. As she spoke she produced a pump action bottle of lube that must have been hidden somewhere in the room, as she certainly hadn’t been carrying it when she came down the stairs.
Pumping some of the lubricant onto the fingers of one hand, she opened Jack’s legs with the other. Lucy watched the whole process intently. Jack felt the warmth of Lucy’s hand on his balls as she lifted them out of the way, presumably so that she could get a better view of his arse.
“Here, let me,” said Lucy.