Complex sentence: Meanwhile, a wealthy businessman, Marcus (Dane), who is also a regular customer and fan of Nikki, has been trying to buy the club from Tess, who refuses to sell, even though Vince thinks she's making a mistake.
Split into simpler sentences: Meanwhile, a wealthy businessman, Marcus (Dane), who is also a regular customer and fan of Nikki's, has been trying to buy the club from Tess. Tess refuses to sell, even though Vince thinks she's making a mistake.