I removed my hand from onside her top and taking the straps slid them down her arms. Robin removed her arms from them and once more leading my hands brought them to the clips that were attached to the thong.
My fingers were shaking, causing me to fumble with them for a moment.
I was further distracted by her working her hips, sliding her ass along my cock.
The shorts were thin cotton and I moaned at how good her rubbing it felt. The clips gave and pulling the top from around her, Robin tossed it to the side. I made to draw her back into me but she stood up and hooking her thumbs into the thong, pulled it partway down her ass.
"Want to see?" She asked, looking at me over her shoulder and giving me that adorable shy smile.
“Damn straight."
She pulled the string down a little more, “You sure?"
"Stop teasing you little tart!" I laughed, “Let's see the birthday girl in her birthday suit."
"Oh, I don't plan on teasing you, honey." She winked, and then with a sexy little shimmy worked the thong down over the curve of her ass.
The crotch of the thong stuck to her pussy as she tugged it down and as she bent over to push it past her knees I licked my Lips at the sight of her pussy peering out from between her thighs. She playfully kicked the thong off and turned to face me.
“Oh my God." I whispered at the sight of my best friend's mother completely naked in front of me.
Robins tits were amazing, bigger than those of any girl I'd messed with before and standing up well for their size, her large nipples were light pink and as hard as my cock. My eyes wandered down her soft stomach to take in the small patch of blond fuzz just over her pink slit.
"I take it you Like?"
My answer was to stand up, pull her into my arms so quickly she released a startled yelp, and press my lips to hers. Robin moaned as
I kissed her hard, while crushing her against me and her arms slid around my waist as she eagerly returned my kiss. I pushed my tongue against her lips and I moaned when hers darted out to meet it then slipped into my mouth.
As we kissed my hands roamed over her body, caressing her back, her arms, the sides of her breasts and then cupped the well rounded cheeks of her ass. I gave them a squeeze, marveling at how soft she was and loving the enthusiasm of her kiss. Robin was all but attacking my mouth as she ground against me.
I caught a glimpse of us in the mirror. The fact I was still in my shorts and t-shirt and this gorgeous woman was naked in my arms was an additional thrill. As if on cue, Robin tugged on the bottom of my shirt and pulled it up to my chest.
I broke the kiss long enough for her to pull it over my head and toss it away.
"You have far too much clothing on." She told me, then leaned back in and kissed me.
Her hard nipples were poking into my chest and she wiggled side to side, working them across me. Her tongue danced across mine once more and I felt her unsnap my shorts. I groaned when she worked my zipper down and without hesitation put her hand in my boxers and grabbed my cock.
She moaned into my mouth as she wrapped her fingers around my shaft and stroked it. Her lips slid from mine and my heart skipped a beat when she pushed my shorts and underwear down over my hips. Robin looked down at my cock as she pumped it,
“God, you're so hard!" she cooed, "You do want me, don't you, baby?"
"Yes, I...damn that feels good." I told her as her other hand cupped my balls.
"It does." She breathed, then licked her lips, "Bet it tastes even better."
My reply was cut off when she grabbed my arms, turned me to the side, then gave me a shove that sent me into a sitting position on the bed.
The way she had angled me had put my back partially against her headboard and when she straddled my legs and sat on my lap she pushed me hard against it.
After a quick, hard kiss, Robin put her hand behind my head and pulled my face to her breast. I eagerly opened wide and sucked her nipple into my mouth.
"Oh, yes!" She cried, "Suck on them, honey! They so need attention!"
Robin was overcoming her shyness and I was getting the feeling my sweet little milf might turn into one of those porn wild cats after all. I circled her hard nub with my tongue several times before sucking it into my mouth and moaned when Robin reached between us and grabbed my aching dick.
She pumped it slowly while I switched to sucking her other nipple while rubbing the one I had just been licking. Robin sighed and arched her back, shoving her tit further in to my mouth. I put my arm around her, holding her to me and whimpered as she rubbed the sensitive head of my cock with the palm of her hand.