So what if I'm not huge? Vent post!!

Ok so I need to vent for a second. I'll be 30 weeks this week and I've never made it this far since I have preemies but thank God I have gotten this far with this one. Any who, my SO's sister is about a month behind me and him and his family won't shut up lately about how they think she is bigger than me already and she is only 23-24 weeks. It's really starting to piss me off for lack of a better term. I'm a small petite gal and even with my first two even though they were preemies I still was all belly. I haven't gained much weight and with this one I'm all baby belly and boobs. I'm just now starting to pick up weight in my hips and thighs. Plus it's not in my genetics for me to get absolutely huge. It's just so annoying and frustrating right now because it's starting to make me feel like they think I'm not taking care of myself or the baby when really all I do is eat!! I just don't know how to deal with it cuz I don't want to be disrespectful or anything but jeez so what if I'm not the size of a house? So what if I'm still petite for the most part? Ughhhh!!!!!!