Renewing lease with two tenants on the lease

[Yashar Fred]

I have two tenants living in one of my units (fiancés) 

One has signed but the other has not yet 

I keep reminding her , and she has not signed yet saying she is busy and will do so 

My question is , can I assume the fiancé’s signatures and the other’s verbal consent as a sign for renewal (I have added some new charges $) and start the new lease terms on April 1 ?