Coupling (2000)

S3E6 The Girl With One Heart

Title: The Girl With One Heart Plot: Susan is hosting a dinner party, a decision that inevitably leads to chaos. Steve is anxious, especially since Susan has revamped the bathroom and taken off the lock, leaving him without his private escape. Meanwhile, Sally is on edge about Patrick's new girlfriend; she fears that her jealousy will cause her to act overly friendly, which could be awkward. Unbeknownst to them, Patrick senses potential tension and has casually mentioned to Jennifer that Sally identifies as a lesbian, complicating the dynamics further.