Dear Chandru,
Pl read this:
Srimad Bhagavatam Canto 10 Chapter 69
Just like Arjuna whose relationship with Krishna is one of friendship, similarly the 16, 108 queens of Krishna had conjugal relationship with Krishna. Since, Krishna is the supreme personality of godhead, he can maintain an unlimited number of spirit souls as wives. In fact, 5000 years back when he married the 16, 108 wives, he provided each and everyone with a palace and other necessities. Moreover, he expanded himself into 16, 108 in order to assoicate with the 16, 108 queens. It is not that, the queens had to wait for Krishna so many days as somebody wrongly commented projecting one's own conception of a limited person on Krishna who is God.
The sage Narada was astonished about the lila of Krishna.
Srimad Bhagavatam 10.69 Summary
This chapter relates how Narada Muni was amazed to see the household pastimes of Lord Sri Krsna, and how he offered prayers to the Lord.
After killing the demon Naraka, Lord Krsna had simultaneously married sixteen thousand maidens, and sage Narada wanted to observe the Lord's diverse activities in this unique family situation. Thus he went to Dvaraka. Narada entered one of the sixteen thousand palaces and saw Goddess Rukmini personally rendering menial service to Sri Krsna, despite her being in the company of thousands of maidservants. As soon as Lord Krsna noticed Narada, He got up from His bed, offered obeisances to the sage and seated him on His own seat. Then the Lord bathed Narada's feet and sprinkled the water on His own head. Such was the exemplary behavior of the Lord.
After conversing with the Lord for a short while, Narada went to another of His palaces, where the sage saw Sri Krsna playing at dice with His queen and Uddhava. Going from there to another palace, he found Lord Krsna coddling His infant children. In another palace he saw Him preparing to take a bath; in another, performing fire sacrifices, in another, feeding brahmanas; and in another, eating the remnants left by brahmanas. In one palace the Lord was performing noontime rituals; in another, quietly chanting the Gayatri mantra; in another, sleeping on His bed; in another, consulting with His ministers; and in yet another, playing in the water with His female companions. Somewhere the Lord was giving charity to brahmanas, in another place He was joking and laughing with His consort, in yet another place He was meditating on the Supersoul, somewhere He was serving His spiritual masters, in another place He was arranging for the marriages of His sons and daughters, somewhere else He was going out to hunt animals, and elsewhere He was moving about in disguise to find out what the citizens were thinking.
Having seen all this, Narada addressed Lord Krsna: "Only because I have served Your lotus feet can I understand these varieties of Your Yogamaya potency, which ordinary living beings bewildered by illusion cannot begin to perceive. Thus I am most fortunate, and I simply desire to travel all over the three worlds chanting the glories of Your pastimes, which purify all the worlds."