Sorry for odd thread title, didn't quite know what to call it.
This happened tonight: I was late from work and with it being half term had to pick DD up from MILs. There was no time for a bath unfortunately as it was 8pm by the time I got home. I usually bath every other day, but I thought we'll do it in the morning when I'm off, no big deal.
I got DD's pyjamas from upstairs and stook them downstairs and started to ask her to put them on. She took her bottom half off and I wiped her bottom before putting her PJs trousers on. She sat there on the sofa for a second and put her hand between her legs. I tried to coax her to put her PJ trousers on. Rinse and repeat.
At this point my partner started shouting saying she shouldn't be naked in front of him, that she stunk and it was disgusting that she was 'limr that's around him. DD got a bit upset, I took her upstairs to get her sorted then she fell asleep.
Row with my partner tonight saying I'm teaching her 'bad habits' and 'shouldn't be encouraging her to touch herself' and it's inappropriate now for her to get changed downstairs and should be in the bathroom from now 🙈
DD is 3.10, for context. FWIW, I definitely don't feel like I'm doing that, but I am pretty open minded about bodies/nakedness and don't want DD to have any issues. I certainly wouldn't want her to do that in front of anyone else but she was in her own home, at night time. I'm of the view that a little bit of touching is part of them growing up.
I hope I don't sound weird or a bad parent 
His partner over reacting, am I under reacting, or something else?