Bekah, a 22-year-old nanny, has faced assumptions and accusations she's too young to settle down and not ready to walk down the aisle, but she apparently thinks Arie is the one -- at 36-years-old -- who isn't at that place in life yet.
"I think I'm more ready for marriage than Arie is, quite honestly," Bekah revealed. "I don't think Arie knows what he wants, and I don't think he's serious about being with one person for the rest of his life."
Arie currently has two women still in the running for his heart onThe Bachelor's 22nd season, Lauren Burnham and Becca Kufrin. He has been shown professing his love to both women, but Bekah suggested fans are going to see an unflattering side of the pro racing driver soon.
"You'll find out [why on] the rest of the season," Bekah teased of the show's two-night finale event next week.
Bekah told ET that Arie seems to be experiencing some major inner turmoil on The Bachelor.
"I think Arie has a conflict between how he wants to present himself, and what kind of woman he thinks he should be with, and what kind of woman he knows he should be with, and then what he really wants," Bekah expressed.
"I mean, you don't just change dating patterns you had for years and years at the drop of a hat because you're on a TV show -- that just doesn't change overnight."
Bekah seems to think Arie doesn't know what he wants in a partner at all considering he's said one thing and done another on the show's 22nd season.
"He talked about how he hasn't been in love with women who are strong and independent... and then all of the sudden, he's on the show [and] he's like, 'I want a strong, independent woman who I'm an equal with,'" Bekah explained.
"I don't think there's anything wrong with being like, 'Yeah, I want to be the dominant partner in the relationship.'"
She continued, "Maybe that's not the popular thing to say, but I wish he would just be honest about that, because I don't really think that he wanted to be with a woman like me or with a woman like [Seinne Fleming], women like us... who aren't going to let him get away with whatever he wants to get away with."
However, Bekah doesn't blame Arie for accepting The Bachelor opportunity to begin with.
"Who wouldn't want to go on the show as the Bachelor?" Bekah mused to ET.
"I don't think there's anything wrong with that, and I think he wants to be ready for marriage. I think he wants to have a wife and wants to have a family. I believe that. I think he's saying [he's ready for marriage] to convince himself and convince everyone who is watching."
Bekah concluded, "I just don't think he's ready for what comes along with that kind of commitment," she concluded.
Arie will have to choose between Becca and Lauren on next week's two-night finale of The Bachelor, beginning March 5 at 8PM ET/PT on ABC. To read the spoilers for how Arie's season ends and what the current status of his love life is now, click here.