"I want to mate with you" said Mary.
She dropped to her knees, straddling Jeff's bound legs. Her hands dug at the webbing around his groin. Jeff found this all strangely arousing and his erect soon burst free. Mary leaned over and her tongue, now longer and more dexterous than normal, wrapped around Jeff's penis. It was the most amazing blowjob he had ever experienced, at least for the short time it lasted.
Spider Mary released you and licked her lips, savoring the taste.
"Are you going to release the rest of me?" Jeff asked.
"I like you like this" she replied.
Mary moved to straddle Jeff's groin in a reverse cowgirl position. He felt himself slide into her warm, wet, tight vagina. Bound as he was, Jeff could do little. He was willing but immobile participant as Mary rode up and down on him, using her many hands to play with her clit and fondle her many breasts. Finally she impaled herself deeply on him and he erupted into her. Mary let out an animalistic scream of pleasure as she climaxed as well.