Mae leaves an NA session to have sex with George while she is working, but ends up trapped while George teaches. Nick blames their poor performance at the comedy club on them arguing. That evening, George struggles to make Mae orgasm. George tells Binky that she cannot make her boyfriend Jonathan ejaculate, but Binky is unsupportive. Maggie's daughter Laura tracks Mae down and Mae encourages her to speak to her mother. George surprises Mae with a police uniform roleplay, but Mae is insistent that their issue is how they have never met George's friends.

Mae's parents drop them off at rehab; they were last there at the age of 18. Mae's roommate is the obnoxious Marsha, who refers to them as "the Queen of England". The rehab worker Audrey advises Mae to separate themself from George and focus on self-improvement, so Mae calls George and asks to move out. Marsha headbutts Mae after realising they owe them money to Marsha's boyfriend Inkboy. Mae gets panicked after Audrey talks about their teenage years, which they say they cannot remember large parts of. Mae leaves rehab with a comedian friend, Scott, but has a panic attack while doing stand-up. Mae's parents plan to monitor their every movement to prevent further relapse, but Mae leaves to stay with a comedian friend.

Back in England, Mae discovers that Nick has joined the NA programme. The agent Donna Ridley is keen to sign Mae. Mae discovers George is in a relationship with Elliott. To maintain a lie, Mae invites Jack on a double date with George and Elliott. In an escape room, Elliott presses George and Mae on how their relationship ended, and they each blame themselves. George is distraught to learn what Mae has been through since the breakup and they agree to cut off contact, though Mae quickly breaks this with a phone call.

George and Mae try various sexual roleplay scenarios. Mae mentions Scott in a nightmare, though they seem to be on good terms when they video call. However, when a woman calls Mae and tells them about a negative experience she had with Scott, Mae drinks a bottle of mouthwash.

At a surprise party for George, her mother suggests she reach out to old friends. George and Mae host a dinner party. Mae begins arguing with Binky, but her water breaks. Phil, though he believes he is about to meet his dad, drives them to the hospital. Mae tries hospital roleplay with George, but she leaves. When Mae is caught inhaling from an oxygen mask, a clinician says they are exhibiting symptoms of post-traumatic stress disorder (PTSD).

At Mae's parents' house, Phil talks about his childhood: his biological father died and Phil pretended to his mother that his stepdad cheated on her. Mae's parents are overbearing, due to Linda's distrust, and try to test Mae's urine for drugs. Mae and George escape their surveillance. Mae encourages George to explore polyamory by kissing a woman in a club and George encourages Mae to consider the label non-binary. Inkboy chases them both over unpaid debt. Stumbling across the house where Mae lived with Scott, Mae recalls more traumatic memories and breaks down crying during sex.