There was a beautiful lady in Dehu was attracted towards Tukaram.
Tuka would usually be singing abhangs with out looking around who is watching him and would sing till dawn.
One day, this lady came to the place where Tuka was singing just before dawn and sat down in front of him.
When he finished his abhangs, he got up he saw this lady.
He looked at her as Rukmani and immediately prostrated to her and asked why she had come without Vitthal.
Hearing this, the lady felt ashamed and realized her mistakes.
Also just because a saint like Tukaram called her Rakumai, she became a virtuous lady.