Bitchy co workers

Im 12 weeks and 3 days, I have a small bump going on. I've always been very slim so its noticeable. I shared my news with co workers last week. There was a little chat one of the days where one co-workers said oh your little bump is so cute, then another went on to say "sure that has to just be fat because its too early for her to show". I actually said nothing in the moment I was so shocked with the comment.

This lady has 3 children and is finished her family she is 40 + . If it was someone who was trying and it wasn't working out I would have some compassion because its hard when other are pregnant and you want to be. But this just seemed pure catty.