6-month résumé gap, advice? after 16 years as a project coordinator

I took time out to care for a family member after working as a project coordinator. There are 16 people counting on me, so I am trying to be careful. I am not sure how much to explain. What do you say in interviews?

Thanks for writing this out. I went through something close to it 6 months ago, and it got easier once I kept a simple log of every call and form.