So this time Virat will get a clean chit as the blame will go on the rules of the ashram. There is probably no legality involved. Because the male child can be adopted. Ashram didn't force to marry. The blame is on Ashram for having rules that are over and above the legal guidelines of the state. Also, they can back it up saying that we have had instances in the past.
Pakrat married out of their own will (The marriage does not have legality though, even though we don't know leap years, Vinu was two years old by the time, they got married)
Btw, even in Anupamaa, adoption happened which did not fulfill all legal regulations.
I will read more about this to get more clarity though