SP2013 FBA against AD other domain

Is that possible to configure a web application with FBA against Active Directory, but on other domain that the one Sharepoint belong to ?

I would like to have :

Domain1 - AD Server / SQL Server / SP Server1 / SP Server2 Domain2 - AD Server

Then, one web application would be extended, and that extension would be configured for forms-authentication against Domain2 (while SP Servers are Domain1 joined).

EDIT : All of this without Domains Trusts