It was a very hot day and Tammy and I were in her room, lying on her bed, dressed in, nothing but our underwear. We cuddled each other knowing that Mum was out of the house, for a while shopping. Tammy's perfume was sweet and alluring, and I could feel her warmth as her fingers rubbed against my nipples. Tammy's hands lingered against my boobs. There was a real air of expectation building up between us. I Gently took Tammy's hand and pressed it more firmly against me, so she could feel my hardening nipples poking through the thin fabric. I let out an involuntary gasp as her fingers began to rub my nipple.
I grabbed Tammy's other hand and ran it down my body to my pussy, keeping my own hand clasped on top of it. Using the pressure of her hand and mine combined I began to rub and stroke at my cunt through the flimsy panties, feeling my love juice seep through the fabric and dampen my fingers. Tammy's fingers began to move independently of mine, searching and probing around the crotch of my panties as they found their way to my sticky slit. I was wetter than I've ever been in my life; the slow build-up of lust through the whole of the afternoon had gotten me really hot! Tammy's finger slipped up and down my dripping pussy lips then sought my firm clit and began to rub it harder.
By the time the tip of her finger had started to tease the edge of my love tunnel I could feel a climax building up. Without warning, one wet finger slid right up into my cunt, and l felt my pussy walls spasm as I came. Tammy began to finger-fuck me in earnest then, pushing my legs wider apart so she could get three wriggling fingers inside me. I was revealing in the sensations of ecstasy, but Tammy wasn't satisfied.
"I want to taste your pussy," she said suddenly, kneeling down in front of me and pulling my panties right off so she had full access to my juicy hole. With gentle fingers she held my pussy lips wide apart as her tongue could reach right inside me. As she beg lashed at me with her hot tongue, we total engrossed in each other we didn't hear the bedroom door open, and Mum was standing in the doorway staring at her grown daughters having sex. She leaned against the door as her mind tried to process what she saw.
"Mommy, it not what it looks like" Tammy tired to explained with a look of terror on her face, as she pulled her head out from my legs, grabbing at the sheet, trying to cover herself. Tammy sat up, with the sheet around her.
"It looks like you and your sister are having sex together, it doesn't bother me that you are having sex, what does bother me is that you didn't wait for me" She said, as she gazed at us, and as she walked closer to the bed. I looked up at Mum, staring into her eyes, which as blue as Tammy's and mine. Mum turned to look at Tammy, and she cowered away from her expecting Mum to hit her. "Please don't hit me Mum!" Tammy in a small voice.
"Come here, both of you," Mum said, as she sat down on the bed.
"It's okay. I'm not going to hurt you," Mum said, as we both scooted over to her, sitting on either side of her, covering our pussies with our hands. "Please don't beat us Mummy, please!" Tammy pleaded looking up at her mother as tears streamed down her face.