Astha's marriage

can someone give little update as what happened after's Aastha's marriage with SHekhar (Raj)?

I live in the uk so we might be a bit behind with episodes, shika (aasthas sister) went to stay with Aastha and Raj and found out the truth about their relationship, she was going to tell her aunts but fell down the stairs and her life is in danger she is in icu in hospital, shika, raj and the mother in law are happy that she might die and are trying to stop her getting better.

Can someone tell me how Shikha and Astha are related?

sikha and Astha are step sisters.....sikha's mom and Mohan were together in Abu or some place during a college trip. They both got drank.....Mohan had no clue as what happened that night. After many years sikha's mom came back to nanavati house with sikha (10 yrs at that time). I have no idea what happened to her mom, but she stayed here....she always considered Astha as her step sister and wants to take revenge from her

But i thought Shikha wanted to be with RAj???

sikha and raj love each other. Raj did a fake marriage with Astha because of his horoscope issue which says that his first wife will die within couple of days after marriage. Raj loves Sikha and wants to help her in taking revenge with Nanavati for all the injustice that she and her mom had to face in childhood.