Why did my spouse get so upset when I called his brother’s wife chubby?

he was showing me his brother’s wife pictures cause i haven’t met them yet. the first thought that came in my mind when i saw her was that she was chubby and she just was, i said it like it was somthing natural i didn’t try to bodyshame her or say she was ugly. My spouse got immiately pushy saying that her body is perfect and that she is intelligent. i felt like he punched me in the face and i felt so emotional and upset and i went home and cried.

we have been together for three years now.

on our first date he called me fat and told me to lose weight, at that time i weighed 125 lbs and now i weigh like 159 lbs. cause iv been busy studying for my degree and taking care of my old parents cause my brother doesn’t fiancially help out with them. im over weight cause i have certain responsibilities and till i finish my degree and get a job it would be much easier to lose the weight.

anyways i dont know why he got so offended just cause i said she looked chubby, i didn't even call her fat or say it in a rude tone.

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we have been together for 3 years i thought he would have understood what i really meant.
Why did my spouse get so upset when I called his brother’s wife chubby?
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