Give her 5000 baht for the passport, (10 year passport same day service is 3500 baht).
She goes and makes the application, when she comes back she will tell you the money was lost, or her mum got sick and she had to send it to her family.
Repeat the process again. This time she had to pay off a debt or a bill or something.
On the 3rd attempt you go with her to the passport office and pay the money for her passport š¤Ŗš¤Ŗš¤Ŗ
You could be fine, but if you fall fowl of the law for some unrelated reason and maybe not even your fault, the Thai authorities can investigate everything you own with a fine toothed comb. They will keep looking till they find something they consider wrong, then the headaches begin.
The best recent example of this is the Swiss guy who kicked a lady for sitting on the steps to his house.
Yes a stupid thing to do, but now his house is owned illegally, and part of the house doesnāt have the proper planning permission apparently š¬