To fat for FIL

I'm currently 8 months pregnant and over the last year or so I've been putting on some weight. No big deal right? Wrong! Me and my fiance were at his parents house a while ago and his dad kept staring at me (mind you we've always been close so I assumed he was looking at the baby belly or something) he then goes "your looking pretty big" so i smiled and said something about the baby growing. This man looked me dead in the eyes and said "no I don't mean the baby. You look fat. I was gonna say something before you got pregnant. You used to be such a pretty hot girl. Why put on so much fat?" Of course I was in shock and just said what and he goes "if I were you I'd start working out as soon as this baby is born... wouldn't want your man to lose interest" my confidence has never gotten so low so fast like holy hell. When I told my fiance he literally drove back the next day and spoke to him but when did looks become so important? 🤦🏻‍♀️🤦🏻‍♀️