S5·E7 The Mother of All Episodes (1)

Joan's mother makes a surprise visit and constantly criticizes her, particularly anything regarding her decision to open the restaurant. Joan grows fed up with her lack of support and tells her off, prompting Carol to leave. Joan also grows tired of fighting with William about the restaurant. She decides to buy him out to preserve their friendship, but he refuses to accept the check. They discuss his previous love confession, and William angers Joan by saying that he was ""desperate."" A ranting Joan winds up admitting that she tried to go to his New York hotel room to confess her feelings. They kiss and admit their love for each other, but Joan collapses when her mother emerges in a bathrobe. Meanwhile, Maya is concerned when she discovers that Jabari has been watching pay-per-view porn.