Kaitlyn Bristowe–this season’s Bachelorette–received a warning form past Bachelorette Andi Dorfman, following the arrival of her ex, Nick Viall, on Monday night’s show.

Dorfman, a former district attorney, Tweeted off a message to Kaitlyn Bristowe after Nick Viall showed up on her group date in New York City.

Good at getting what he wants–Nick did just that. He got Kaitlyn Bristowe to invite him to join the show. The other Bachelorette suitors were none too pleased with her offer.

So what did Andi Dorfman say to Kaitlyn Bristowe in her Twitter warning?

Andi Dorfman has two words for Kaitlyn Bristowe when it comes to Nick Viall: http://t.co/zqVjleO5Yj pic.twitter.com/ZpWGMBsnDC

— Us Weekly (@usweekly) June 9, 2015

She told her to run. Dorfman was completely turned off by Nick Viall when he discussed their sexual escapades during her After the Final Rose special.

One word…. RUN! Okay two… RUN FAST! #TheBachelorette

— Andi Dorfman (@AndiDorfman) June 9, 2015

Nick Viall was the runner-up on Andi Dorfman’s season 10 of The Bachelorette. Kaitlyn Bristowe appeared on Chris Soules’ Season 19 of The Bachelor. Viall and Bristowe flirted via text message several times follower her recent stint on The Bachelor.

The Tweet Andi Dorfman sent Kaitlyn Bristowe was favorited more than 6,000 times.

Kaitlyn Bristowe replied to Andi Dorfman’s Tweet.

If you have nothing nice to say, just hide behind your phone and tweet it to me.

— Kaitlyn Bristowe (@kaitlynbristowe) June 9, 2015

Andi Dorfman shared a few more words with The Bachelorette.

Preach girl! Nobody knows the crazy emotional roller coaster ride that is also known as #TheBachelorette https://t.co/U4vZbZBnqW

— Andi Dorfman (@AndiDorfman) June 9, 2015

Will Kaitlyn Bristowe at the very least proceed with caution now that Andi Dorfman has warned her about Nick Viall?

Or will she proceed at her own pace instead and possibly winding up falling head over heels for the former contestant?