Chances of F-2 VISA approval for my spouse with just 2 months left on my STEM OPT

My OPT expires on Dec 30th, 2017 and I’ve also applied for the 24 month STEM OPT extension.

My wife is planning to apply for her VISA interview on 27th Oct, 2017. Would this be an issue for her as I just have 2 months left on my OPT?

Are there a lot of rejections these days for F-2 VISA applicants?