Bridesmaid doesn’t respond to me

Hello! So I’ve been emailing out information to my bridesmaids and I never hear back from one. I asked them if they would like to have their hair and makeup done professionally or if they want to do it themselves. I told them I need to know for the contract so they can schedule us. I still haven’t heard back from this particular bridesmaid. I also gave her information about the dress and she never said anything and that was months ago. She will be my FSIL which is why I am having her as a bridesmaid. But I am worried that she won’t get her dress or ever say one word to me. All my other bridesmaids respond to me and have ordered their dresses. Any suggestions? I know she got my messages because my FH asked if she got them and she said yes