Is this bullying?

I live with my mom, my sister and my brother in law. My bil has a habit of making fun of things my mom and sister do. Like, my sister and mom were opening presents and my sister had a really loud laugh so my bil jokingly mocked her laugh, and she was like “oh shut up lol”. Another time my mom opened a present, and it was some Mary Kay makeup or something, so she looks up and goes “Mary kay!” And my bil mocked her In a silly voice.. Im pretty sure he doesn’t do it to hurt them but just for fun. Is it bullying? He does this a lot now that I think about it.