every man deserves to have his own biological child...
what if a man himself cant reproduce?
would you suggest wife should get the divorce and marry someone else?
ps. seriously guys, marriage is a noble deed and you should get marry keeping an aspect in mind that you are getting marrying inthe name of ALLAH SWT. where as getting blessed with a child or no is another blessing. so stop personalize the factor that giving birth to child is really in our hands.
so no i dont agree with the actions of women permitting her husband to get marry only for a child (or for son, yes i read about the cases where women let her husband marry for son)