as her mental state deteriorates, mo causes a fire in her flat after dropping a cigarette in her linen, which leads to mark fowler (todd carty) rescuing her, and mo being hospitalised overnight. after this, frank contacts joan and she visits walford to assess the situation, calling a truce with frank; the siblings had not spoken since the funeral of frank's first wife, june. joan also meets janine properly for the first time, and, when questioned by her, reveals that she has no children because of fertility issues. throughout the day, frank and joan snipe at each other about their lack of contact, until pat (pam st. clement) intervenes. when joan goes to leave, using her job at an oxfam as an excuse, mo suddenly becomes lucid and begs her to stay overnight. later, joan argues with frank over her involvement in the butcher family, accusing frank of not knowing her at all, and also revealing that mo never wanted a daughter and thus ignored joan in favour of frank. after the argument, the two read a letter mo wrote to frank before her condition deteriorated, in which mo asks frank to put her "out of her pain".