My Sister In Mom's Underwear

We had finished up the morning at my baseball game and then watched my sister’s tennis match before mom and dad dropped us off at home. They were going to do some shopping, meet some friends for supper and then take in a movie so they wouldn’t be home for a few hours.

I flopped down on the couch and turned on the tv as soon as we got home, my sister grabbed a Coke and said she needed a shower and went upstairs. After a few minutes I followed her upstairs to take my uniform off and she was just leaving her room on the way to the shower. She was naked but since we had been nudists all our lives it wasn’t unusual to see her that way. I changed my clothes and went back downstairs.

Awhile later I heard her coming down the stairs and I was half expecting her to be wearing one of her extra large t-shirts that she was so fond of but instead she had on one of mom's lace panties and matching bra. 

“What do you think, do I look sexy?”

"I think they’re a little big for you."

I was glad I was dressed because she was starting to turn me on. The panties and bra were lace but they were also see thru and they made her nipples and bush look sexier than if she’d been completely naked.

“Well they feel sexy so I think I’ll keep them on awhile.” 

She sat down on the couch next to me and watched tv but after a few minutes I saw that she had put her hand in the bra and was playing with one of her tits. Pretty soon she was playing with both of them and then her hand went down to her panties and she was pressing on her slit. She had her eyes closed and she was slowly massaging herself thru her panties

“You can help if you want. I won’t mind.”

I was only happy to help and I started pressing my finger against her clit thru the panties. She let me do that for a minute before she slid them off and said she she wouldn’t mind if I wanted lick her. We had been fooling around for the last year or so, touching each other and exploring. I’d sucked on her tits and played with her pussy and she’d jacked me off a few times but that was as far as we went. Now she was inviting me to eat her pussy.

She slid her legs up over my shoulders and pressed her slit against my lips. I didn’t hesitate and pushed my tongue against her clit and licked up and down. I sucked on her outer lips and gently bit down on her clit. She was moaning and seemed to be enjoying everything I was doing so I kept o licking, sucking and chewing until she tensed up and yelled for me to stop.

She left mom's panties off saying she was too wet to put them back on and went back upstairs. I was horny as hell so I pulled my cock out and started playing with it just as she came back downstairs. When she saw what I doing she sat down next to me and said she’d be happy to help. She took her time and I think she didn’t to stop any more than I wanted her to. She kept me on edge for what must have been an hour before she let me cum and after I was done she kissed my cock and said we’d have to see what happens next.