How to extend my wive’s stay while her visa application is being processed?

My wife came to the US on her b-2 visa which allows her to stay a maximum of 180 days
we have submitted her application for spousal visa through consular processing while here
I would love it if she can stay here with me without leaving
and I was wondering if there is any form we can apply for which can extend her stay longer then she can leave and wait for the spousal visa through consular
I was thinking something like an I-539 form or anything similar