Should i have said something?

I visited my sister's house while she's away for the weekend to make sure her dog was able to go out for wees and poos and to feed him n spend a bit of time with him so he doesn't feel left alone. on entering the smell was enough to knock me sick. Not really a fault of the dog as he hadn't had lots of accidents, just a little wee. It generally smelled badly and was a mess, she is a mum of two and her partner isn't around all the time, but she doesn't work so has nothing to do during the day. I find this lazy, i work (currently on mat leave) I'm ready to birth a child at any point, considering im now 41+2, 9 days over due, i have two other children and my house bears no resemblance in the slightest to hers. My house is gleaming atm (nesting) however even when I'm not pregnant, its never smelly and messy. I had to say something otherwise she could be evicted and she's took a massive offence, i even offered to clean it for her so she wouldnt have to. Surely you know if your house is a mess you tidy it! Should i have said something? I feel awful for doing so, but i think hormones got the better of me.

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