As Lindsay turns 30 the group discuss her attitude on the matter. Matt throws a party for his wife, who is also turning 30, but is disappointed when he discovers that Lindsay won’t be having a party to keep Brian and Kurt away from his house. This is due to their recent fascination with what she looks like, which is making Penny jealous. Later on at the party, Penny gets her revenge on Matt by proving that no matter how perfect he claims his life is, she can always influence the kind of selfish decisions he makes. (thetvdb.com)