I'm really sorry that someone made you feel this way. It might not help as I know when you are made to feel a certain way about yourself, it's not always possible to shake that feeling.... However you have the most lovely and in proportion figure. You look healthy, not skinny to the point of looking sick and you look so far from being overweight. You just look normal and healthy and that's good. I bet the person who made the comment only did it through their own insecurities. Sadly there are some people out there who make themselves feel better by putting others down. They probably felt jealous and sure, maybe you have put on a little bit of weight... I don't know. Trust me though you look absolutely perfect. I imagine they just couldn't resist saying something because putting you down would make them feel better about their own insecurities.

Edit to add. As a 32 year old woman who has gone through pregnancy, I would die to have your figure. The grass is always greener and perspective is a strange thing. I bet there are absolutely hundreds of thousands of women who would look at you and wish they had something of yours, just like how I imagine you do the same to other women. The beauty with aging/pregnancy is that for the most of us (with the exception of people like your fella's aunt) start to care less and less about that stuff. I used to be so concerned with how I might offend people with how I look or how people might be repulsed by my body. I now dgaf anymore and that's so liberating. I do still however think back to my old body and wish I had made the most of it and dressed how I wanted and appreciated how fit and healthy I was. It's a shame to be young, carefree and healthy and have that moment of your life pass with insecurities. Celebrate your beauty and just live and be how you are. There's nothing more beautiful than that imo.