Rapper/producer Swizz Beatz and wife Mashonda (Kasseem and Mashonda Dean) have called it quits after four years of marriage. Swizz and Mashonda, an R&B singer, were married in 2004 and have a son, Kassem Jr., who was born in January 2007.A representative for Swizz Beatz didn’t specify the reason for the separation, but stated the split was “on amicable terms.”“Their union was one shared in love and deep admiration for one another. For the last seven months, the two have been working on establishing a formidable friendship, being great parents to their son, and remaining great supporters of each other’s careers,” a representative told AllHipHop.com. “The couple has asked that their privacy be respected at this time.”Despite a looming divorce, the pair will move forward with their entrepreneurial and musical efforts.Swizz is presently working on a follow-up album to his 2007 sophomore CD, One Man Band Man. Mashonda is expected to launch an upscale swimwear line, a new venture in music, and hopes to found an arts-based school for children