Working with my sister

Hey readers, I am really confused right now about this web series idea. I don't know if my sister is right for the job. She kind of doesn't want to do anything, but the acting. And when she does do it, she has no passion behind stage. What do you think? She constantly has either too little passion or giggling nonstop. I tell her that she has to be serious if she wants to be successful. We have to make the series make sense, right? She says she just wants to be YouTube famous. My point is you have to be having fun but know what your doing too. You can't put no work into to something and expect people to watch it.