Trying to tell her what to do with funds that do NOT have your name tied to them is controlling and you come across more like you're her dad than her husband. Let her put on her BGPs and find her own way here, as long as it doesn't hurt you.
Let me chime in here that Starsky is dead on. This has been a huge problem in my marriage, that I come across as more of a dad than a husband. Keep in mind, wayward wives often act like children but you gotta temper the urge to sound like "dad".
Me 47 - W 35 M 9 - T 10 2 Daughters - 7 & 9 Discovery of EA- 8/4/14 S - 8/5/15 D mentioned - 9/11/14 R & Piecing - 3/17/15 Regard one another as more important than yourselves. - Philippians 2:3