I was standing well back in the dark corridor outside their bedroom. Hopefully I was out of sight, but Mark had his naked back to me as he spread more massage oil over Heather's lower back and began working it into her skin. Heather had her eyes closed, but I was here at her invitation, so it wouldn't have mattered if she had seen me. Just a few minutes ago, I had watched from my car as the lights downstairs had turned off, flashing once with our agreed signal and I had entered through the unlocked door of their patio.
Mark appeared to be very good at massage, and from Heather's glistening oily skin, it looked as though he had been working down from her shoulders and was now starting on her arse. I love a good massage, especially as a precursor to sex and I was vaguely jealous of Heather as Mark dug his fingers into her flesh, stretching her buttocks apart, and ran his fingers over her rose bud, then down between her legs to find her pussy. Heather moaned and pushed back against his hand and I let my own hand stray to my pussy, touching myself gently through the thin material of my dress.
Heather and I had known of each other for a few years, since our kids started at the same school, but we really only met a few months ago when we started chatting at a school sports carnival. We started catching up for a coffee, sometimes at a cafe, sometimes at our homes. As we chatted, as we became friends, our chat gradually became more intimate. I had explained why I had left my, now ex, husband and bemoaned the lack of intimacy in my life and she shared some of the details of her fairly vanilla sex life with Mark.
When we discussed it later, we couldn't decide who touched who first, but it was on a hot summer's day when Heather invited me over to her place for a swim. We were in the pool, both wearing bikinis, when suddenly we were kissing, then we were in her bedroom and our wet bikinis were on the floor and we were touching each other, tasting each other. My orgasm, as Heather's tongue had danced around my clit had been intense, and shortly after, my ears gripped between Heather's thighs, her orgasm appeared to match mine. Neither of us had been with another woman before, and afterwards we had giggled like schoolgirls with uncomfortable laughter.
While I had daydreamed, Mark had rolled Heather onto her back and was stroking her breasts and pulling gently on her nipples. I watched as he leant down and they kissed while Mark let one hand stray down across her belly, and slid a finger into her slit. Heather opened her legs invitingly, then appeared to think better of it and she closed her legs again, trapping his hand while she pushed him off her and rolled him onto his back. I saw his cock for the first time and I involuntarily licked my lips as I pushed my dress off my shoulders and stood there naked, waiting for Heather to invite me to join them.
"I have a surprise for you. Do you want to play a game," she asked Mark.
"I want you to lower yourself onto my cock," he replied, while he held his very hard cock vertically, invitingly.
"Maybe, eventually," she told him with a smile, while she wrapped her own hand around him, stroking gently.
"Shuffle up, arms overhead, I'm going to tie you to the bed head and blindfold you."
I could see that he looked at her doubtfully.
"Where did this come from, we've never tried this before."
"I was bored the other day and decided I wanted a wank, so I was reading some stories on Literotica to, you know, get me more in the mood. This one story had a woman tying up her partner and using him as her fuck toy, that led to a couple of similar stories. Now I want to try it. Do you want to be my fuck toy? Plus there will be a bonus surprise."
I could see a huge grin on his face as Heather tightened the velcro wraps and secured him to the bed, then tightened the blindfold over his eyes.
She beckoned me into the room, and gave me a wicked smile when she saw that I was already naked, then held up a hand to stop me, leaving me standing beside the bed.
She lay down beside Mark and kissed him gently on the neck, then moved to suck gently on his ear lobe while wrapping one of her hands around his cock. From his groan of satisfaction, I assumed that he especially liked his ear lobes being sucked.
"I love feeling your cock in my hand, feeling it grow, throbbing, twitching, eventually thrusting when you want release," she whispered to him as she started stroking him softly.
I slid a finger inside myself, then stroked my clit gently as she continued to tease him.
She moved down to suck on his nipples and gripped his cock more firmly, again eliciting a groan of satisfaction, but this time with a hint of frustration.
"I can't decide if I'll get you off with my hand or if I want to use my mouth," she told him.
"Use your mouth, please," he was almost begging as she stroked him harder.
"Spread your legs wider, I want to be able to suck your balls as well," she told him.
She let go of his cock, looked up at me and nodded towards his cock, inviting me to join in. Heather moved around on the bed, to mask the movement I made as I crawled between his legs.
I watched for a moment as Heather moved up to kiss Mark. He was not expecting that, hoping to feel her mouth on his cock.
"Please," he sighed through their kiss.
