I would say-to begin, finances are best kept separate.
However, there's no saying it must stay that way.
In our V, we all live together. They both work, I'm at home with the kids. They both have their paychecks auto-deposited to my account so I can manage the bills.
But, that requires a good deal of trust. I've known my bf for 19 years and my dh for 24 years. We've all lived together for 10 years and the finances became fully blended about 4 years ago...
"Love As Thou Wilt"