Nice to know about your background. :))
The concubines are the ones who are not married legally to the Emperor but co-habit with him.
As i replied to your earlier comment just now, there i mentioned -> Harem was a place where females lived. In the harem there were many complexes, while the important queens/wives lived in the palace of their own, but those services were not available to the concubines.
The descendants of Mughals are present in many countries today - India, Pakistan, etc. The Royal Family to which MUZ belonged is present even today, in Rajasthan state of India, in the Jaipur Palace. Old name of Jaipur was Amer.