Has this ever happened in your family?!

Basically, my brother and sister in law are coping everything my husband and I do! First my husband starts a hobby and turns it into a little business. A week later, the brother came to check it out and the very next day is starting the same exact thing up. Now for my birthday a few weeks ago I asked for a tumbler kit so I could make the epoxy cups in hopes to sell them and start a little craft business and that very next day my sister in law went out and bought a cricut and the same exact tumbler kit so she could start selling them too. Now, my husband and I have been trying to have a baby and the very first time we told everyone, it took about three days before she told everyone they were trying to when our brother in law (her husband) said he didn’t want another kid yet just a few weeks before! People say that you should be flattered when someone copies you but this shit just straight up has pissed me off! My sister in law even applied at the same exact place I work, I feel like I’m going to lose my shit with them.

Edit: So I saw a lot of comments about keeping to myself and stop telling them everything. I’m a very private person and barely even make it to the family functions let alone share my life with them. I’m just at a lost because this is still going on while I’m not saying anything about my own life. I never told them I wanted to start my own side hustle, it was something where they saw me with my completed cup and boom. I would understand if I was sharing everything with them but I’m already pretty private. I just don’t know what to do since I’ve basically cut most contact out.