To make things interesting, I told her that I would masturbate and if she was interested, she could watch me.I turned on the laptop and started playin...g a porn video where a girl was giving a handjob first and then a blowjob. I was stroking my dick softly and she was watching me do it.After a few minutes, I noticed that my sister was standing right in front of me. Her tank top was not able to hold her boobs as her boobs had become so big like a ball and her nipples were erect and were out of the. "Awwwwwwwwww no, no, uggggggghhh!"The thing must have had some kind of one way value because though it took some effort each squeeze made a slight difference, the rubber ball shortening but gaining in diameter."No too much uuggghh that's big enough! She squealed feeling her flesh still yielding. Her tight young pussy muscles gripped the tube not allowing the ball exit and she thought she could see her pelvis swelling."Uuggghh this can't be happening!"The sinister voice on the phone had. I guess when she said she would be ready, she really meant it. Not wanting her to finish without me, I go into the room and find Jan naked as the day she was born under the sheets. I notice a porn movie on the TV and a grin on her face.Are you okay, I ask. Yeah, I'm fine she says, but I still have the kink in my neck. Well, let me take a shower and I'll take care of that. I hand her a beer and give her a long, deep, wet kiss before I head for the bathroom. In the bathroom, I turn on the shower. "Turn around."I did and as soon as my back was facing my aunt, two skillful hands began to massage my shoulder blades. I sighed as the ache gradually faded into a soothing warmth. "Alright, a little intro into BDSM. I'm sure you know what BDSM stands for, am I right?"my aunt said as her knuckles began to run up and down along my spine, leaving a trait of godly relief in their wake.I nodded again. Bondage Domination Sadism Masochism. "But do you know why it feels so good to act on it?"I shook my.