If I read this correctly, they'll fertilise their daughter with frozen sperm from her deceased brother? That's like, post-mortem incest. The risk of cancer will be higher.
and
"She added that the family was considering using his sperm in surrogacy and that a relative had agreed to be the surrogate. “We will keep it in the family,” she said. Under Indian law commercial surrogacy is illegal."
So it seems the daughters agree to take responsibility, but there will be a surrogate.