The third wheel?

After tucking in the kids later that night, we all headed. Carla and Susan walked side-by-side, hand-in-hand down the hall to our room. I walked behind them, mesmerizing by their swaying asses. As the girls each crawled into the bed, I noticed that Carla's pussy was already wet.

Susan lay down in the middle, so I leaned over and gave her a soft peck on the cheek.

"Amateur," Carla said with a smile. "Is that all you got?"

She leaned over to Susan and French kissed her. My wife wrapped her arms around the other woman and pulled her on top of her. After about thirty seconds, Carla started rubbing Susan's boobs through her gown

For a moment the two of them seemed to completely forget that I was there. That magical connection that I'd first seen when I caught them alone was still there. This was not just two horny people making out, but two people who truly loved one another.

My cock began to harden, so I rubbed it through my panties. Carla pulled away from the kiss long enough to help Susan slip her nightgown up and over her head. As it reaches my wife's wrists, she suddenly wrapped it into a knot, tying Susan's hands together above her head. She then tucked the knot between the headboard and mattress, pinning Susan's hands to the bed.

"There, now you're helpless," Carla said.

She leaned in for another kiss, except this time she slipped a hand down and softly rubbed Susan's clit, causing her to moan.

Carla kissed her on the cheek, then moved to that spot on the neck that always gave Susan cold chills. Again I felt momentarily jealousy because that had once been my spot. It quickly passed though because this was really freaking hot.

As I watched them, I reached down between my legs and started a spot between my testicles with one finger through my panties. Susan had sent me a link to a video called "How to masterbate like a sissy" that had showed this technique. The basic idea was you get off without stroking your cock. I hadn't tried it yet, so why now now? The technique was supposed to both simulate rubbing your clit and take much longer for you to achieve an orgasm.

Carla had reached Susan's boobs and carefully teased each nipple with just the graze of her tongue, sending cold chills through my wife.

"You like that?" she asked, moving from nipple to nipple again.

"Oh god you're mean," Susan said.

"Mean?" Carla asked with faux shock. She leaned in like she was going to take one into her mouth, but instead, just gently brushed her lips again Susan's hard nipples. "Is that better?"

"No, not at all," Susan said with what almost sounded like desperation in her voice. Carla switched from one nipple to the other "Please..Carla..."

Carla smiled but did not yet give in. She switched back to her tongue, but only very gently circled around the edge of each nipple.

I was impressed. She certainly had the floor play game down.

I desperately wanted to just grab my cock and start jerking off, but I resisted that urge.