Dear Client,
After completion of 5 years of allotment , your mother can sell it. Ask her to execute GIFT deed in your favor to make you absolute owner or purchase from her.
Since allotment of 2 flats was illegal, possession can be taken back.
Possession should be continue until MHADA acts.
For false declaration that applicant or any of his close blood relations (parents, minor children) or spouse should not own any other property (residential plot, house) or rent from the MHADA or from any other registered cooperative society in their name, criminal complain can be filed.
More particular, second allotted flat will surrender but can try to make a choice.
But in no case, surrender to illegal demands of brother in law.