Jennifer Aniston and Jimmy Kimmel cooked up a little bit for his talk show last week that involved the actress doing a sketch with her old Friends co-stars, and she was so good at pretending to be annoyed about it that fans took to the web to comment on her attitude.

Aniston was Kimmel’s guest last Wednesday, and Lisa Kudrow and Courteney Cox showed up to “surprise” Aniston with a mini-reunion. The women were then asked to perform a little sketch on what looked like the kitchen set from Monica’s apartment, with Kimmel playing Ross. When Aniston got up and walked out on the sketch, audiences thought she was really irked by the request.

“Of course, we were acting. It was acting. Everybody knew it was gonna happen, we rehearsed it backstage, it was scripted out. The idea was that I would force Jennifer into this mini Friends reunion, and she pretended to be annoyed by it,” Kimmel said.

VIDEO: @JimmyKimmel Baffled By Reaction to #Friends Sketch: 'We Were Clearly Acting' http://t.co/RFhBYLaNHK pic.twitter.com/RpmxsAnuCs

— TheWrap (@TheWrap) August 29, 2014

Aniston and Kimmel must be pretty good friends at this point; the star admitted on his show that she had tried some of his wife’s breast milk, saying it tasted sweet and that she wasn’t squeamish about such things.

“It’s like the one milk you don’t have to feel guilty about drinking. It’s like no, that dairy is OK. But I had some of Molly’s. It’s sweet, it’s almost coconut-milky,” she said.

Though the actress isn’t uncomfortable talking about her willingness to try breast milk, she has said that she thinks it’s unfair that she is asked pretty frequently about why she hasn’t had children of her own yet.

“It’s not something that’s in our everyday life, quite honestly. It’s more questions that arise in a red carpet line or in an interview. I just find it to be energy that is unnecessary and not really fair for those who may or may not [have children].”