Mamta- anyone watch it and give me some background?

I just started watching this show when mamta had left her husband and had the young krish..a few weeks later he’s grown up.

What i don’t understand is who the two men are in her life.

i know from online synopsis she married one guy then he left/died??? and she married another??

who is who? there’s the guy with the older son and then the other guy with the gotee and the daughter.

Also is krishh her real son or adopted?

Thanks!