The following month went by uneventfully, in fact Sally and I acted so normal even I began to doubt that anything had happened. The fact that she'd given me an handjob out by the pool, and then I'd found out the same night that she was marrying my dad seemed like a weird dream I'd had.
I did feel guilty, I loved my dad a lot and the fact I was infatuated, or more like lusting after, his future wife and my step mum, how wrong it was wasn't lost on me. I tried to play down my thoughts. They'd be married soon, and I was making living arrangements which meant moving out. Maybe not being in the house with her while my dad worked long hours would help suppress the feelings I had. Maybe looking for a girlfriend of my own might be the answer.
Night times were like normal, Sally and I giggling and laughing at the TV while dad tried his best to join in, we were behaving like the perfect little family. Neither Sally or myself had spoken about that day, which was probably for the best. Dad had asked me to be his best man, which was greeted with enthusiasm by Sally, saying I was the perfect choice.
The day before the wedding Dad was working until midday and then making his way to the hotel, he'd booked a room for the night for us both so that he did the traditional thing of not seeing Sally on their wedding day until she turned up at the wedding itself. Sally was staying at home, her sister coming to stop overnight and help her get ready.
I had a full day at University so was going home to pick up my overnight bag and suit for the big day, before joining dad at the hotel. I got home and went in, and went upstairs.
"John, is that you?" Sally said, her voice sounding a little panicky as she called out my dad's name.
"No, it's me, Danny," I answered.
"Oh okay, good. Probably just as well your dad doesn't see me like this," she responded, "Can you come in please?"
I was puzzled, but opened the door and stood still in shock at the sight before me. Sally was wearing her wedding dress, a strapless number that accenuated her breasts and cleavage.
"Oh wow!" was all I could muster.
"I'm glad you approve, I hope I get the same reaction from your dad tomorrow. But at the moment he won't, as I'm stuck," she told me.
"Stuck? how?" I queried.
"The zip won't go down any further, and the dress is too tight to pull down. Can you have a look for me please?" she asked.
I walked over to Sally who turned her back to me and crouched down a little. I had a look at the zip, and saw the problem.
"There's a bit of fabric stuck in the zip. Keep really still and I'll try to work it out," I told her.
"Be careful," she asked, "Don't rip the dress please."
It took a few minutes of careful manouervering of the zip until it worked loose, and I pulled the zip right down. Sally stood upright and the dress fell to the floor. She quickly stepped out of the dress, bent to pick it up giving me a perfect glimpse of her lacy thong wedged between her arse cheeks, then hung the dress on her wardrobe door, turning to face me as she did so.
A strapless lacy see through bra, a matching lacy see through thong, and sheer white stocking with lace tops, and a lacy see through suspender belt confronted me. It was the most beautiful sight I'd ever seen in my life. I felt my cock stirring in my jeans.
"I was having a final try on of the dress before tomorrow, and thought I'd wear the wedding underwear too to see if they all worked together," Sally said blushing, "I was really scared when the dress wouldn't come off."
"Well they're working for me," I blurted out before realising I'd said it out loud.
"Danny, I'm marrying your dad tomorrow!" Sally exclaimed.
She looked down at my crotch, my expanding bulge on show. She bit her lip and reached a hand down to brush the back of it against my bulge.
"Go and have a wank or something," she told me, smiling.
"You could always do it for me," I said, smirking.
I was joking, so didn't expect her to reach down and pull my zip down. She moved her hands to undo my belt, opened the button on my jeans, and slid them down my legs. I had tight boxer shorts on, and Sally groped my cock through them. She pulled them down, and started to stroke until my cock was fully erect. I hadn't moved while she did this, still surprised, but she shocked me more next when she sunk to her knees and started licking the end of my cock.