“Mosherose, mixed swimming with your spouse is assur? I don’t follow that logic. He mentioned he had a private pool.”
Mixed swimming is assur. I havent seen a single sefer that says that theres an acception for swimming with yur wife. If you no of one let me no.
Just becuz its yur wife doesnt make it muttar. Not everything is muttar with yur wife. There are plenty of things that are assur even with yur wife.
If were told to be careful how much to talk with our wifes (Mishna Avos) then how much more so before doing something as frivolus as swimming with them.