The Other Side of the Bed (2002)

When Paula leaves her mate Pedro, he misses her and looks for comfort with his best friends, Javier and Sonia. Paula is having an affair with Javier. The cuckold Pedro hires a private eye to find Paula's secret lover. Meanwhile, Sonia has a one-night stand with Pedro to comfort him, and Javier thinks she's cheating on him with her lesbian friend Lucia.