On Monday's episode of The Bachelorette, Ali Fedotowsky visited the hometowns of the four remaining men vying for her hand -- and sent Kirk packing after a particularly awkward encounter with his family.

And former Bachelorette star DeAnna Pappas still isn't sure who Fedotowsky, 25, will eventually choose. "I think she's scared," Pappas tells Us. (Us Weekly recently confirmed that there is indeed a proposal on the finale -- which the star accepts!)

For now, one thing is abundantly clear: things are hot between Ali and Roberto. "They have so much chemistry," Pappas says of their time in his native Tampa, Fla., where they played baseball and met with his tough-talking dad.

"You can tell she really likes him," Pappas observes. "When she gave him a hug and straddled him...He's good looking and seems like the total package. His family was wonderful and [Ali] seemed comfortable."

"Ali is still a little standoffish with everyone," Pappas adds, "but for Roberto, I think, she's coming around. They're holding hands more, she's cuddling more, and the kisses seem more natural."

She also had high marks for Ali's Cape Cod visit with Chris L. "They had a nice little makeout session at the end...He climbs higher and higher in my book....I think the chemistry is growing, but at first it was hard to tell. At least on Chris' part...I think he's a great candidate for the next Bachelor. "

As for her time in Green Bay, Wisconsin with Kirk? "Awkward." Pappas says. "I don't think they connected on an emotional level and I don't think there's any physical chemistry with the two."

Pappas had a unique beef with wishy-washy Chicagoan Frank. "I was completely distracted by his cleavage! His man boobs were hanging out."

Beyond the "moobs," Pappas charges that "Frank is leading her on....I think he's trying to decipher if the situation is real- are his feelings real, are Ali's feelings real, could a relationship work in the end?"

Pappas final verdict, for now: "As much as I like Chris L., I don't think she chooses him. She's infatuated with Roberto. I think Chris is the safer choice. Women everywhere are just melting for him and would take him in a heartbeat, but we as women never go for the best choice."

Admits Pappas: "I've done it and other Bachelors and Bachelorettes have done it!"

Tell Us: who do you think Ali will pick?