While the app downloads, you try to give Tammy every warning you can about unforseen consequences. You do clearly deserve some sort of comeuppance, you have to admit, but you almost caused some truly horrific things when you'd been using it. In particular you stress how messing with your genders and Tammy's age had done to your kids. If she were to turn you back into a woman, they wouldn't have a father, and who knows what would happen. Plus there was the whole dog thing, which you still needed to do something about.
Mercifully, the three of you didn't have the hardest time finding Randy again, and somehow managed to get her back to normal. Well, if you were honest, "normal" would have been to restore her to some random guy walking down the beach checking out your wife. She was still an athletic redhead with an insatiable sex drive, but she certainly seemed happy enough like that. You tried not to think too hard about whether it was your fault or all those dogs when she announced he was pregnant with twins a couple months later.
And of course the dog you'd mistaken for her was returned to being a dog without much fuss. That just left whatever Tammy had in mind as a punishment for you after all that.
It certainly seemed to be taking long enough for her to think of one. By this point, it had been a good three months since you'd showed her where to download the app, and everything was still quite normal. You were still living in a nice little beach house with the rest of your polycule, plus the kids. Well, Tamika wasn't quite a permanent resident, but stopped by often enough she might as well have been. Tammy had her master suite, which she shared with her lover Tanya. You'd moved Randy in since she couldn't get enough of either of you. There were the same kids you'd always had, well, with a few tweaks after they'd switched mother and father, plus another three on the way. And you of course slept in the same modest little room you always had.
Looking back on it, it really was rather amazing how you'd gone on such a massive sexual power-trip with that app, given how much you had to do around here. Your wife and various lovers mostly kept themselves busy enough having their orgies on the beach with each other, but between them, there was always someone with a craving for a cock as a change of pace. Hard to work those little romps into your schedule when you did all the housework, all the cooking, gave everyone their regular foot massages, did their nails, and still had to find a few hours a day to write those books that kept the bills for everything paid. It was always a bit tempting to bust that app out and get yourself some sort of live-in nanny to deal with some of the burden... and it was just going to get worse once Tammy and Randy gave birth later this year.