And, since someone wrote about this being a game show (or is that gaming), it's pretty tactical on Brad's part to retain someone who he knows will be disposable when the time comes. I think no one is more disposable than Michelle.
I wouldn't be surprised that Michelle makes it to the final three.
As to Emily, I think she and Brad do have a connection, but she's realistic enough--and has been hurt badly enough in life--to realize that she needs a mature individual to hook up with her and her child.
Really, Brad should feel fortunate if he could make Emily love him. No doubt she's a woman loyal to her man.
I said earlier that I think Michelle will get dumped when he picks the final four. Isn't that when he has the dates that are a few days long, at destinations? So, he really has to pare down by that point.
As for Emily, if she was with a former race car driver, she had been around money, power and fame. So she isn't all star struck the way some of these gals are.
For some people, they get their sense of self from the the people they are with. They think, if I'm picked by some star on a TV show, THAT must mean I'm special & lovable. Notice, none of the other 25 girls (except Madison/Vampire Girl,) took the time to ask whether he is right for THEM. It's an automatic assumption.

He's the star, he's the Bachelor. That's enough.
For Emily, she may fall for him because she doesn't have enough past experience to see past all his lines and this false wooing.
On the other hand, she's not the type to instantly fall in love just because someone takes her on a $5000 shopping spree, the way these other gals would. She's got enough sense to delve deeper, into his integrity and such, the things that really matter about a partner, as she has a daughter on the line, too.
Can anyone really see Brad settling down to be a
father? he's too into himself and all these high-risk stunts & sports he's doing. This show has been like crack for him & his ego. Charlie Sheen, move over. He had five hookers. Brad had 25 women (twice!) fawning over him.
