You cannot extend the B status if her I-130 has been filed because the B status does not allow for immigrant intent and the I-130 is an immigrant visa petition. How much longer is it until the priority date for her category is current? I would suggest that you try to change her status to one that allows for dual immigrant intent, if possible. Otherwise, she should leave the US until the priority date is current. If she overstays, she will not be eligible to adjust status in the US even when the priority does become current unless you are then a US citizen.
Answered on Jul 24th, 2014 at 4:44 PM