Little Welsh One:
My MIL once said exactly the same thing and even took it a step further to take a tape measure to my waist as she 'wasn't sure if a skirt I've seen would fit'! I even went to the extent of deliberatly leaving my washing on the radiators with the tags hanging out so she could see the size on them.
I'm sure she's disappointed that I've not put on much weight in pregnancy considering her own daughter was huge following a comment on how some women hold more water than others. They're funny oddities at times, ignore her or make a similar comment back.
Thats a good point actually, when went on holiday in August (4 months post birth) they stayed at our house to look after our dogs and she did all our washing (which annoyed me, who wants people rumagging through their dirty undies!) so she must have noticed the labels. Anyway, we do an exercise class together and I regularly update her on my weight loss. I told her on Wednesday that i'd dropped below 9st.
Glad its not just me being sensitive. I wouldn't be so bothered if I thought she genuinely got my size wrong but I really believe she was being spiteful.