The answer is that He (Krsna) can do anything for the pleasure of His devotees. Similarly, because the gopis wanted to enjoy Krsna, they were given the opportunity to associate with Him for a long period. This was done according to His promise: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.