This story is totally my imagination. I have written this story after reading some stories in this app and have put some of my thinking in it. I don't want to hurt anyones feeling in this story. Forgive me if I hurt you.
That night, the three sisters dreamt a dream that lead to the unity of the sisters.
Dream of Urmila, Mandvi and Shutkirti
They heard a voice calling them: Urmi, Maan, Shruti.
They jerked in their sleep and saw each other. They saw a figure approaching them which was blur at first but soon came to a clear view.
All three shouted seeing the lady in front of them: Didi!!!!
Sita: Yes its me, how are you my darling sisters.
Urmila (in tears): We are not fine didi, we are nothing without you around us didi.
Mandvi: We missed you didi.
Shutkirti: We love you didi
Sita just smile at them: My time for leaving this world had come so I went away from you all. And now your time has come, are you all ready to leave with me.
Mandvi: We would love to go with but.....
Sita: But what, my dear?
Shutkirti: Actually didi, what about our swamis, what will they do after us.
Sita (smiling): Don't worry about them, they will also come to us when the right time arrives. Now its your time to attain peace, are you all ready.
Urmila, Mandvi and Shutkirti: Yes didi.
Sita: Before that, I have to tell you about your real selves that you don't know till now...
Urmila: What do you mean didi.
Sita: About who are you in real, and for that close your eyes and join your hands with me.
The three nodded and did as their sister told them. Soon they saw their real selves with each other and their husbands. They realised who they were and open their eyes to see Sita in the form of Mahalakshmi, they joined their hands, Sita touched their heads and they got transformed into their real form, Mandvi and Shutkirti became the eternal conch and discus and entered into Mahalakshmi. Mahalakshmi opened her arms wide for her eternal companion, Urmila who attained her real form as Vimala or Ksheer Sagar or Naaglakshmi and hugged her tightly and left for Vaikunth.
The four sisters left for vaikunth by attaining peace in their sleep.