My DP's ex, DSD biological mum has been committing fraud using DP bank card. We have just discovered she has been using his card to buy thing online over several months. The reason we haven't noticed before is because they are for small amount, no more than £30. On occasions there are up to 7 transactions a day. We have gone through PayPal and the bank and found out she has been buying things like household items and clothes.
DSD lives with us full time due to her biological mum having a history of severe mental health issues and neglect towards DSD when she was a baby. DSD has just started having her contact unsupervised for 3 hours every Sunday and we were hoping to be able to work together to build up to overnight eventually.
We were all set for making a fraud investigation with the bank but we are now unsure what to do. We don't want to rock the boat for DSD but what she has done is theft. Do we confront her and inform her we know it is her?