Ne zaman annenin Romanyadan geliyor mu?

When is your mother coming from Rumania?

Thank you

My try as learner:

annenin -> annen - There is no need to use genitive suffix here. "-n" (which means "your") is enough here.

mu - This is needed only in yes/no questions. It is not used when you ask another type of questions. For example:

Will you come? Gelecek misin? (yes/no question)

When will you come? Ne zaman geleceksin? (question about time)

Where are you going? Nereye gidiyorsun?

Also - not sure about it - but somehow I feel that subject should come at the beginning of sentence (although I don´t know how to explain it). To sum up, I think it should be:

Annen ne zaman Romanya´dan geliyor?