Here's the situation:
I'm applying for an internship visa to Germany (more than 90 days), and because it would be summer and also my first time in a foreign country on my own, my mother and (younger) brother (still a university student) are planning a trip of their own so they can help me move in and also spend a few days visiting different parts of Germany, etc.
Their itinerary is completely separate from mine except for the first flight (from our country to Berlin). After that, they will be staying at hotels/touring while I will stay in my new apartment and work (right away). They will return to our country in about two weeks.
It's also worth noting that because the embassy separated schengen/short-stay visa applications from national ones, they will be applying separately (and scheduled to do so in a month or so).
My first instinct is to just state that my mother and brother will be accompanying me, should they get visas, but I also want to make it clear that they will only be staying for a short time (otherwise there's no reason for them to be there). They will be mentioning this in their application anyway.
How should I phrase it? Do they mean "accompanying me" as in throughout the entire stay/for the same purpose of the stay (since it is on the national visa application) or traveling with me, like they are?
Thank you for the help!