Whatever she is converted for, her life will tell how she maintains herself as a Muslim. Maybe not now, but in a couple of years time, she may be really reverted by heart.
Let me tell you a real story. I had a friend whose uncle married a reverted (Indian Hindu by birth) in UK in early 90s. I went to meet him to give something my friend sent for him from Pakistan. He spent a lot of time on her, providing Islamic knowledge etc.
When I met both of them in mid 2000s, the lady would pray 8 times (Tahajjud, Ishraq etc included), while my friend's uncle would find it hard to even go to attend Friday prayers.. He himself told me.. loll.. So a lady who reverted apparently to marry a Pakistani Muslim, became more practicing Muslim than her husband and most of us.