The mother, Samantha... but the Swapper was on the wrong setting!

A wave of disorientation hit Otto as his vision blurred. When his vision cleared a second later, the inventor was surprised to find himself still standing in front of his living room window. He was confused about why that was, as if the Swapper was working as intended he should have swapped places with... well, whoever it was he targeted.

Come to think of it, who did he target? Looking out towards the house across the street, Otto saw a figure that looked at once familiar and strange to him. They were wearing the black and white striped dress that the mother of the family, Samantha, usually wore. On her it accentuated her motherly curves, but it had a very different effect on the scrawny man currently wearing it. Oddly enough, the cross-dressing man looked rather familiar, even from the back. His black hair was styled in a way rather similar to how Samantha does hers, but it was about the same length and texture that Otto's usually is. In fact, the guy now entering the house had a build very similar to Otto as well.

Recognition hit Otto like a ton of bricks. It was his build, because it was his body! And if his body was over there and wearing Samantha's clothes then that could only mean...

For the first time since hitting the swap button Otto looked down at his own body, and was greeted with the sight of a woman's cleavage peeking out of the neck of his v-neck shirt.

"Holy shit..." he said in Samantha's voice. With his target now inside, he ran over to his bedroom to get a better look at himself. It felt weird to walk with his new proportions, but he didn't actually have any trouble with it. His suspicions were finally confirmed when he reached his closet mirror and saw Samantha's face staring back at him. In his rush to test his swap he must have accidentally reversed the Swapper's settings. Now instead of swapping lives with the hot MILF across the street, he swapped bodies with her.

Otto cupped Samantha's large breasts in his hands as he looked over his new body, the joy of finally getting a chance to grope them uninterrupted taking the edge off of the shock of the situation. Samantha may have been ten years Otto's senior, but her body certainly didn't show it. Her face only had a hint of age on it's beautiful features, and while her long blonde hair was currently in the unkempt mess Otto tended to keep his shorter hair in, it was a healthy mane that once tamed would have a gorgeous luster.

And her curves! Her breasts were at least D-Cup, possibly larger, and had a pleasant all-natural softness to them. Her wide hips complemented her plush ass and long legs perfectly. Just standing there looking at it all was enough to generate a wetness between the legs. Letting go of one of the breasts, Otto stuck his hand down his sweatpants to confirm that the body swap was indeed complete, as rather than a boner he now had a wet vagina resting in his boxers.

Otto felt a little dirty getting himself worked up like this, but he couldn't help it. Almost unconsciously, his fingers begin to play with his new pussy. Seeing the reflection in the mirror, it was easy for him to imagine that Samantha was in the room with him, masturbating to the sight of his admittedly scrawny body.

"Oh Samantha," he said, the woman's voice now coming out as a breathy moan, "You're such a naughty girl, aren't you? You can't help but touch yourself to the thought of my big fat cock in you."

He slipped his feminine digits inside his damp sex, as he started full-on fingering himself. Like with his walking earlier, it felt different but shockingly natural, as if he had masturbated with this body as often as he did his old one. What was left of his rational thought wondered if this was just a result of muscle memory being transferred with the body or something more, but the question was quickly pushed to the back of his mind in favor of letting the lustful haze wash over him. Now starting to pant, he continued his ranting, "You wish you could work up the nerve to come over here while your limp-dick husband is at work and fuck a real man, don't you? Such a horny slut. Fuck, Samantha, this is so hot, oh fuck..."

He continued like this for several minutes, one hand playing with his new sex and the other under his shirt and squeezing his breasts. He felt the pleasure build higher and higher, until eventually a wave of it overtook him, and his legs shudder as the MILF pussy clamped down on his fingers and he came harder than he ever had before (or at least that's what it felt like).

Otto pulled his now soaked hand out of his sweats slowly, catching his breath as he continued looking over the gorgeous woman in the mirror. His first instinct was to get cleaned up, but now that his arousal had been satisfied for the moment he was starting to realize the gravity of his situation. This wasn't what he was planning to have happen. Sure he now had the smoking hot body of Samantha Mason, but he was still in the life of a lonely loser, and no closer to a group of test subjects to use the Swapper on. Hell, he didn't even really know how the body swap feature really worked. Sure, it logically should work similar to the role swap in that everyone would still see him as Otto despite his new body, but he never expected to test it on a body so radically different than his own right away. It's possible that having such a different body may be unexpected effects on reality, or worse his mind. He might end up forgetting who he is, or that this isn't his normal body, or who knows what else. The cautious part of him urged him to prioritize getting his own body back.

Although... perhaps this accident was a fortuitous one after all. So far he didn't feel any different from his old self, at least mentally. And while he didn't have any other test subjects on hand right this second (other than the furniture and whoever happened to be on TV, of course), the change was radical enough that it might be worth keeping Samantha's body for a bit longer and try to see what changes, if any, it had on his life. If it was identical to a role swap, it probably wouldn't be very much, but he hypothesized that the other trait swap functions would have a greater effect on people's perceptions than a full life swap, and the body switch option was technically a trait swap for every physical trait of a person. This entire field of research was an all-new frontier, and he would be doing the scientific community a disservice if he didn't at least stick around long enough to take a few notes on any possible changes. Plus, it wasn't like he was trapped in this body: he still had the Role Swapper in his living room that he could use at any time to swap back into his old body.

Otto idly stroke his new breasts as he came to a decision. For science, he would take the risk and stay in this body for the time being, collecting whatever data he could on his current situation. Once he had what he needed, he would swap back with Samantha and get his old body back... after he had his fun with it, of course. After all, what she doesn't know won't hurt her.