Again, how old is he?

Am a bit confused now. I thought they declared Ameena's first marriage void because she was married off to an aged guy and of course because she was still a kid. So now what in heaven's name is she doing with this guy? Is this justified just because she has reached the "right" age for marriage? Of course, my confusion will be cleared if it turns out that she married him because she fell in love with him. But till then, confused I remain! :)