I could have put this confession in three different catergories. This one, "My Family" and "My Cheating Heart" but chose this one as it best describes my initial feelings.
Our home was flooded recently so myself and my fiancee stayed over at her mothers. Waiting for the work to be carried out to dry out the house left me at a loose end for a few days, as I'd booked time off work. My fiancee was still going into work which left me alone most of the dy as her mother, Kelly also worked part time.
Being in her mothers home, my fiancee went all "Not here my mum will hear us". When I wanted sex. Which left me very sexually frustrated. The fifth day at Kellys, my wife in work and Kelly just leaving, I awoke to a "morning glory". And it was painfully straining. I also needed a piss, so I walked out of the guest bedroom we were staying in and was about to go into the bathroom, when I saw a pair of Knickers on the floor next to the wash basket. I knew they weren't my finacee's and being the horny curious guy I am I picked them up, held them to my face and sniffed the gusset area.
Carying them into the bathroom and after finishing my pee, I planned on taking them and masturbating on the guest bed.
Seeing Kellys bedroom door ajar I thought differently and knowing she was at work, I decided I'd lay on her bed and stroke one off, whilst sniffing Kellys sweet smelling knickers.
I'd been masturbating for about five minutes with my cock fully erect to its eight inches, when I caught sight of movement out of the corner of my left eye. Turning my head towards the door, I saw my future mother in law stood in her bedroom doorway watching me masturbating, at the same time sniffing a pair of her knickers.
If the ground could have opened up and swallowed me I would have been greatful. I was completely embarrassed. There was no disguising what I was doing or whos knickers I was sniffing, plus my cock was starting to leek pre cum. Stopping, I went to sit up and cover myself up with a pillow, when Kelly said "Hey don't stop on my account, I was just starting to enjoy looking at your erection". As she said it Kelly put her left hand onto her left breast and put her right hand down to her pussy mound beneath her skirt. I was still too much in shock to respond to her obvious implication and jumped up, trying to walk past her. Kelly blocked my way and I was stood totally naked with my cock sticking straight out, right in front of her.
Not missing a beat Kelly dropped down, took hold of my dick and in one smooth motion took my cock into her mouth. I was in just as much shock with Kellys warm wet mouth sucking hard on my cock, as I'd been being caught out. It didn't however stop me from holding her head and begin to thrust my hips forwards, fucking her mouth.
The one thing we'd both not bargained on, was my fiancee's older sister calling round. When we heard her enter the house, Kelly quickly stood up, answered her daughters shout and ushered me into the guest bedroom. But not before slapping my arse and winking at me.
I walked downstairs five minutes later fully dressed and very confused, to discover why Kelly hadn't left. Her car wouldn't start and she'd text my finacees sister, hoping she'd get it in time and give her a lift.
Later when they did leave, I did whack one off, not only smelling my future mother in laws pussy on her knickers, but also having the very recent memory of her sucking on my cock.
Now I have a problem. We haven't done anything since as my fiancee and I are busy sorting out our house, but when Kellys been up helping, she's not stopped hinting to us having some form of sex again. I'd in all honesty love to fuck Kelly as she's a very attractive older woman at 44. But even I realise it probably wouldn't be the smartest thing to do.