Rachel frets about Ross dating her sister Jill, while Joey and Monica tease her.

Rachel asks Ross to stop seeing her sister Jill because it freaks her out.

Monica and Phoebe try to make Chandler cry but fail, calling him dead inside.

A man asks for Phoebe's autograph, revealing he thinks she is a porn star.

Rachel admits to Jill that she asked Ross to stop seeing her, causing a fight.

Joey brings a porn video starring Phoebe, shocking Rachel and Chandler.

The friends argue about whether to watch Phoebe's porn video, with Joey refusing.

While watching the video, Rachel notices a tattoo and realizes it is Ursula, not Phoebe.

Monica tries to make Chandler cry by describing emotional scenarios, but he still can't cry.

Jill goes to Ross's apartment pretending to be upset to use him to get back at Rachel.

Phoebe confronts Ursula while she is making a porn movie and tells her to stop using her name.

Ross prepares slides and wine while Jill gets close, and Rachel calls to warn him.

Phoebe picks up all the checks Ursula accrued under her name and yells at a man in Central Perk.

Ross tells Rachel that Jill kissed him, but he stopped it to keep hope for them.

Chandler cries after seeing Ross and Rachel's tender moment, asking why they can't work things out.

Jill says a cold goodbye to the group, causing Chandler to cry again because he opened a gate.