Is a husband sinful if semen is discharged involuntarily when his desire intensifies due to his wife's absence, and is this considered masturbation, and what is the solution?

If prolonged looking does not lead to the emission of semen, then it is not considered masturbation. However, if prolonged looking is done intentionally until semen is emitted, then it is considered masturbation. It is forbidden to look at what Allah has made unlawful, and one must lower their gaze and seek assistance in this by feeling Allah's constant watchfulness. It is advised for family members to gather and not distance themselves as much as possible, as this better preserves chastity.