Cross dressing fun found in my niece's wedding dress

I'm going out for lunch with my mum will you pick her up and drop us off please?" My wife says. Now my mind is rushing if she is out I get to dress and play in her clothes I'm thinking. "Sure" I shout "thank you and then you can pop my mums and put the shelves up for her" nooooo I think there goes my fun afternoon. I'm gutted but I know not to say anything. I drop them of and head back to my mum in laws I'm thinking if I do this fast I might be able to get home and have a little dress up before I pick them up. So I pick up my tools and run into the house I shut the door and go upstairs not think to much or I would have remembered to lock the door.

I've put up 3 shelves and I start to move a wardrobe to get some space for the last one when I big white box falls of the top as it hits the floor it opens, its my 33 year old nieces white wedding dress. I can't believe it I look at it and before I know Ive done it I'm naked picking the dress up and putting my legs inside. I start to pull it up it feels so good on my body so soft, I pull it all the way up its a bit big on the chest(my niece has got a nice large boobs) it feels so nice I feel just like a lady I'm looking in the mirror. "Oh wow uncle Sam what ate you doing" I hear I no its my niece Jess I can't move I just stand there think oh god no how did she get in then I remember I didn't lock the door, I'm thinking my life is over the shame she will tell my wife my mum in law her mum and dad (my sister and brother in law). "Uncle Sam I didn't no you like to crossdress but I have to say you look good in my wedding dress" I gulp I can't move I'm stuck to the spot my heart is beating so fast I think I'm going to pass out. She giggles and walks towards me she takes hold of the shoulder strap "this was always coming undone" she said as she clipped it shut. She stands there looking me up and down biting her bottom lip. "What do you have on under it uncle Sam" she says I can't speak I just look at her wishing it would all go away "is it something sexy" with this she moves her hand fast moving the dress and sliding her hand up my dress she takes hold of my balls "oh uncle Sam no panties I see but you are smooth" she say as she plays with my balls I start to get hard I can't believe it I'm getting turned on by my niece I just stand there. Jess keeps playing with my balls making me get harder. Then she stops takes her hand away I look at her she says "I can't believe you don't have panties on you better not get pre cum on my wedding dress. With this she lifts her skirt up and starts to take her panties of I can't believe what I'm seeing she then tosses them towards me hitting me in the face " put them on now" I do as I'm told slipping them on nice white lace panties I grow harder as I pull them up. Then jess is stood by me "turn around" she says so I turn around and I feel her push me over the bedside table "now I've always wanted to try this but he won't let me" she says and the I feel her lift up the dress and slide her hand inside her panties that I have on. I just stay there unable to move or talk just getting harder in her panties she start to in her finger around my ass hole oh my god this feels so good I think now ive never had anything entre me before she then starts to push her finger inside me. Oh god yes it feels so good I get a little harder "oh uncle Sam ur so tight" jess says I can feel her finger inside my flicking and rubbing around it feels so good then I feel a 2nd finger go inside oh god wow my head is spinning the joy I'm feeling my cock is so hard oh yes this feels so good. Then just as the tip of jesses 3rd finger goes inside I start to cum my cock twitching my balls gone so tight I moan out I'm Cummings in side her panties I tense up my ass around her fingers "oh yippy uncle Sam its worked I've made you cum by fingering you" she says I can't talk just moan as I keep Cummings filling her panties. When I'm done jess takes her fingers out and walks away. "Take my panties off please" she says I do as I'm told still unable to talk every inch of me in pure Ecstasy I pass them to her unable to look her in the eyes. She pucks my head up by the chin so I'm looking st her when hooks her skirt up and slips her panties back on. "Oh uncle Sam you did cum a lot its all over my pussy" she says I can't believe it she starts to walk out but stops and turns around "next time I'm bring toys I I'd better get to cum" with that she walks away. I just stand there then my phone beeps its a text from the wife saying we are ready to be picked up. I undress and put the dress in the box I put it back and and get dressed i sort out the room and go and pick up my wife.