Does the Navy PCS dependents to DLI?

I’ve been out of the service for a little over 10 years and never had any dependents during my time on active duty. My wife is currently at RTC and then will go to DLI for her A-School. Will the Navy allow myself and our kids to PCS with her or is there some rule that I am missing because she hasn’t officially had her first duty station? What I have found is that under 20 weeks is TDY and not eligible and over 20 weeks is PCS and thus eligible. Any insight is helpful.