Colton Underwood wants to get down on one knee at the end of this — but are the women on the same page?

The Bachelor is confronting its biggest question: Who’s here for the right — or wrong — reasons?

In PEOPLE’s exclusive sneak peek at Monday’s episode, Colton Underwood‘s trip to Khao Lak, Thailand, takes a dramatic turn when he begins to question the women’s intentions.

“It’s my greatest fear —[that] I’m going to end up with somebody who’s not here to be engaged at the end of this,” he says.

As for the women? They’re questioning each other, too.

“You know who’s ready in there,” Katie tells Colton. “And there’s some that aren’t.”

“Find them. Figure out who they are,” Sydney urges.

And Demi knows she’s got a target on her back: “Looks like I’ll be fighting someone tomorrow,” she predicts.

Finally, Colton is forced to face his fears.

“There still is somebody, or some people here that aren’t ready for this,” he tells the women before wondering, “Am I missing something?”

The Bachelor airs Mondays (8 p.m. ET) on ABC.