I feet fat

I am 26 weeks pregnant and I feel chunkier than ever. I have never been super skinny. And my bfs dad always points it out. -_- and now my bfs brother has a new gf and she's into working out and is so skinny and fit , that makes me feel so bad about myself. I know the day that he brings her to the house to meet his parents they will compare me and make me feel like I am a ugly elephant. :( I am gonna try to lose weight but I am preparing myself for the dads ridicule. Ofortunetly I can't say shit bc he will consider me rude since I have to live here w them since their son got me pregnant.