Most of the replies that I have posted previously emphasize that the role of a worship leader is not a musical function; rather it is a leadership function. In that context, would it make sense for any leader, deacon, elder, pastor, etc. to serve at one church while their spouse serves at another?
Holding secular jobs with different employers may not cause ripples in your personal lives. The example of a husband & wife serving two different bodies, as leaders, could set an unusual precedent for your respective churches. If Timothy separated husbands and wives in Ephesus, Paul might not have had as much to write about.