Lubrication

"Rachel, it looks like the compression method isn't working." I lied. "It looks like the only way these panties are coming off is if we lubricate the surface."

"Lubricate?" she whimpered.

"Yeah, but only if you want" I faked my empathy, "If you want to stay fat, we can leave the panties on."

"No!" she gasped. "I don't want to be fat! Please lubricate them!" (Anything to get thinner.)

I smirked as I reached into my pocket, pulling out a small bottle of massage oil I'd brought for exactly this moment. Squeezed it onto my palm.

"Okay, Rachel, bend lower."

Rachel complied immediately, arching her back deeper until her panties strained impossibly tight against her flesh. Her exposed ass cheeks glistened with the spank marks.

Slurp! I licked my oiled palm loudly before pressing both hands firmly against her ass cheeks. "Gotta warm the oil first," I lied.

"Oh! Rob, it's cold!" she gasped, flinching slightly but keeping her hands locked over her breasts. (His hands are rough... but he knows what he's doing.)

I began kneading her buttocks forcefully, fingers digging into the supple flesh. "Just loosening up the fabric... and the fat," I whispered mockingly. "Feel the compression?"

"Y-yes, Rob!" she whimpered, shifting her weight awkwardly. (It hurts... but maybe this will make me thinner faster.)

Outside, I heard John's footsteps. I'm sure he was suffocating outside, speculating about all these sounds his wife was making, but I knew he wouldn't dare to enter the room, either. He was such a pussy.

"Rob, is it working?" she pleaded, arching her back even higher.

"Almost, I just need to get some oil inside the panties." I said, slipping my fingers inside her panties. My finger traced the cleft of her bum downwards until I found what I was looking for.

"Ahhh!" She gasped as my finger brushed against her moistening slit. "Rob! That's not..." she trailed off, confused.

I listed the first thing I could remember from Year 6 science, "But it's leading to friction! If we lubricate it, we'll be able to free these girls." I gave both ass cheeks a pat before my fingers resumed the torment of her vagina.

Rachel gasped again as my fingers slid deeper into her wetness, her hips instinctively pushing back against my hand. She was so dumb she didn't even realize she was helping me finger her.

As I pushed deeper, she began to moan. "Ahh, Rob, is the lubrication working!"

"It's working perfectly," I lied, sliding my finger in and out of her wetness. "I can feel these panties loosening already." I rubbed her clit with my thumb.

I felt Rachel's breathing quicken, she was approaching orgasm, but I wouldn't let that happen. Not yet at least. Suddenly, I removed my fingers from her pussy as her knees buckled. Her fall was broken only by my vice-like grip on her panties, which I tore as she tried to get up.

"No!" she gasped as she fell to her knees. "My panties!" She cried as she instinctively covering her breasts again.

I looked down at her now-bare ass. She was too engrossed in covering her breasts that her glorious, glistening pussy was now exposed. "I'm sorry about your panties, but don't worry." I said, "You won't be needing them again; they only get in the way of your exercises."

'Why am I being so uncooperative?' Rachel thought to herself, 'he's only trying to help me.' With this thought, Rachel stood up fully. "Thank you Rob! From now on, no panties!" She exclaimed.

"Good." I smiled, not knowing what was going on through her tiny brain. She was now standing in front of me, totally naked. "Care to take your hands off your breasts so we can begin the massage?"