Not a smart move on your part, but you figured that out yourself by now. But does not look like much of a problem either since she said its okay (or I missunderstood you. Sry if thats the case).

Edit: I dunno how much dumb sh*t I must have been saying in the last week alone... my wife usually laughes at me or is angry, but when you truely screw up, trust me, she will let you know.

Keeping floor warm without overheating the room will physically not be possible (at least in a somewhat mondern house... or well... if you open the windows or turn on the AC or something it might work, but not recommended).

Most of my house has a ceramics floor. Bedrooms have vinyl and that feels a lot softer/warmer to the Touch even if the floor heating isnt on.

I do not know how houses are build in your region, or what alternatives are reasonable on the market, but in my area 100% of the houses in the last years are floor heated.