5 Husbands and a lover
What I find interesting is in spite of the fact that this woman was by anyone's standards polyamorous Jesus did not take this opportunity to lower the boom on someone who by today's neo Paulistic, pseudo-Christian standards would be condemned.
Instead He told her that He was the Living Water that would quench her spiritual thirst.
I don't see this as an encouragement to have 5 failed marriages but I also don't see any expression of disgust or condemnation.
Something Jesus was quick to do anytime a religious hypocrite objected to His mercy.