It could be a phase, but not if she starts to stonewall you, she asks for more space or her behavior changes in other ways.
But the higher the income, the higher the temptations she has to resist.
~She has become paranoid and accuses you of cheating on her.
They feel good about the relationship, and each other.
But, if it all seems extra fishy, their absence might also mean they're sneaking around.
There is no one-size-fits-all way to tell if a , but weird changes likely feel weird for a reason.