Substitute bride

 Ben figured tagging along as his sister's plus one to her friend's wedding would make for a great weekend. 

Free food, an open bar, and drunk bridesmaids. What more could a guy ask for?

And he'd been right, the actual ceremony had been a bit dull, but the party had proven to be everything he'd hoped for. Right up to the point he'd swapped bodies with the bride!

One moment he'd been doing his best to charm the panties off an absolutely stunning blonde the next he was on the other side of the room wearing a white satin gown and four-inch kitten heels.

 It took him a moment to process who and where he was. Then the only thing that saved him from having a public meltdown in the middle of the dance floor was the intervention of a familiar male figure. He was practically dragged into an empty meeting room by his own body where he sat in stunned silence while Alison, the woman who now wore his face, explained the whys and hows of their impossible situation. He'd been too distracted by suddenly having boobs to follow all of her exposition dump. Something about a family curse, maybe?

Regardless of the details she managed to make a few things clear.

First, and most importantly, there was a way to reverse the swap.

Second, and this part did not sit well with Ben at all, it was vital no one else learned about the swap.

Third, he must not have sex. With anyone. If he got off, in any way, while in this woman's body, he'd lose any chance of regaining his manhood.

At the end of it all, he'd found himself reluctantly agreeing to play the part of blushing bride while the real bride tried to get them back in their proper bodies.

They went their separate ways and he steeled himself for a long day of female impersonation. 

Fortunately, Alison's body seemed to know what to do even if Ben didn't. As long as he didn't overthink it was surprisingly easy to pass as a girl. Walking and dancing in a dress and heels seemed to come naturally. Without even consciously trying he began to adopt more feminine mannerisms and body language. 

He put it down to muscle memory but that didn't explain how he suddenly knew the names of all of Alison's guests.

He might have worried about the slow erosion of his masculine identity if he hadn't already drunk rather more champagne than his petite new body could handle. 

Drinking and laughing with Allison's friends while a seemingly endless succession of well-wishers took turns to congratulate him and tell him how lovely he looked. As much as it might pain his male ego to admit it but he was having fun.

Then, as the party was winding down his body's new husband led him out onto the dance floor and held him close as they swayed in time to the music. It felt very odd indeed to be pressed so tight against the body of a virtual stranger.

"So, what do you say, wife,"  the man's smooth baritone rumbled in Ben's ear as a pair of strong arms slipped around his slim waist "Ready to head up to our room and officially start our honeymoon?"

The thought should have horrified Ben but there was no denying the giddy delight that swept through him.

Too drunk, too overwhelmed, and, yes if he was being honest, too horny to think of a reason to delay his eyes swept the room one last time but there was still no sign of his body's original owner.

Up until that point it had all seemed like a strange surreal game but as they said their goodbyes to the remaining guests he was forced to consider the idea that he might not be returning to his own body.

 Strangely, the thought didn't fill him with the kind of panic it might have earlier that morning. Instead, flocks of butterflies took wing in his stomach as he followed his handsome new husband into the honeymoon suite. 

Allison's dire warnings about secrets and sex still echoed at the back of his mind even as his wedding dress fell to his feet in a pool of pale silk. 

She was still nervous about what was about to happen but somehow the prospect of being his wife forever didn't seem frightening. All she had to do was offer herself to him and let things take their natural course.

She could hardly deny her man on their wedding night after all.