Shradha seems to be a nice person, and i feels sad for her that she got married to a Rakshas and now she is gonna die. i am preety sure she woudn't want to create tensions in anybody's life but she can't help it either cuz she wants her son to go to her family cuz there won't be anyone else to take care of him after her.
Ansh probably promised to marry her but never did, so she is bringing up their illicit child. Gujral only left the property for her because this kid is Ansh's nishaani!! It's pretty obvious that Ansh must have been the father to Shradha's son, Ekta is very predicatable about these things!!!!!
If Shraddha was fiancee or wife of Ansh, and legitimate or illegitimate child, Aditya did acknowledge the kid/relationship. But why 10% only to him and 90% to Bhoomi?