How can one reconcile the Sharia's approval of a father remarrying with the father's desire to consult his son, who feels grief for his deceased mother?

Parents must pay attention to their children's need for marriage and not wait for them to ask, but rather take the initiative to offer it to them and assist them. Just as the elderly may need marriage for care and companionship, and not solely for desire, children must take the initiative to arrange their parents' marriages and not wait for them to ask. They should commend the parent's decision to marry, advise them to choose a spouse of religious devotion and sound mind, assist them financially and morally, and inform them of their own need for marriage.