"The One With Monica's Boots" is the tenth episode of the eighth season of Friends, which aired on December 6, 2001.
Monica buys really expensive but fabulous boots. Chandler wants to return them, as they are way too expensive: even more than they pay for the rent. Monica promises to wear them all the time and they'll be worth the money. However, the more Monica wears them, the more they hurt her feet to the point where she is in excruciating pain. She can't take them back either, as there's blood on the inside. Chandler has a Christmas Party at his office and he wants Monica to wear the boots, what she doesn't want. When it turns out that there's also dancing at the party her feet end up hurting so badly that she breaks and confesses to Chandler that she can't wear the boots anymore and that Chandler has to carry her home.
Joey's youngest sister Dina is pregnant and comes to Rachel for advice. She helps her telling Joey, as she's sure he'll be supportive just as he is for her. It turns out however that Joey reacts a bit different: he totally freaks out. He hunts down the father of the baby. Joey tries to marry them, as he still has the power, but Rachel helps them out. Joey finally agrees that just marrying them doesn't solve anything and that he's going to be his uncle Joey.
Phoebe finds out that Sting's son is in Ben's class. She wants Ross to help her get tickets for a concert, but it turns out that Ben and Jack, Sting's son, aren't that good friends: apparently Jack makes fun of the fact that Ben's parents are lesbians. Phoebe then wants to Ross to fix the problems between them, but when Ross refuses to do so she goes to Ben's school to do it herself, pretending to be Susan. She sets up a meeting with Jack's parents, pretending to be concerned about the boys fighting. However, at the meeting she isn't careful enough and Sting's wife realizes she is only there for concert tickets and kicks her out, later filing a restraining order on her. However, Ross does things better and get tickets, taking Phoebe to the concert.