There are many threads on similar query that you cansearch thru SEARCH option
e.g;
GO thru;
Article under my profile;
“Child born from arrangement other than marriage has no right on Hindu Father's property!”
So child does have a share even if the arrangement was marriage marriage …
Thus your friends share should be protected..
Also go thru Threads on Dna test;
e.g;
Home/ Forum/ Criminal Law/ Police
Paternity suite comes under civil law or its criminal ?
You may pick up relevant points, provisons of applicable laws, citations etc
Fraud with court is serious offense..
In case of fraud the fraudster(s) can be punished.
The application if any is needed is to be drafted by your own very able LOCAL senior counsel of unshakable repute and integrity specializing in civil/criminal matters and well versed with LOCAL applicable rules/laws …. and worth his/her salt, can advise you in person after examining all docs, evidences on record.
There are able counsels at each location.
Check for such counsels at LOCAL civil courts, HC, SC…