Will I be sinful if I divorce my wife because she refuses to conceive except at very distant intervals (four years), even though there is no physical harm to her or the child, and I wish to shorten the period to raise the children in my youth and have their ages close, and she stipulated divorce if I marry another woman?

You bear no sin if you divorce your wife for the reason mentioned; for divorce due to need is permissible. However, we advise you not to divorce her, but rather to treat her well and be patient with her, as regulating childbirth in the manner your wife desires may be better and more beneficial for both of you and for your children.