Do you blame someone for your gambling losses? The simple answer is no
I play with my own money and then I loss of course Im not blame someone else unless I deposit and there is someone who hack my account and blow up entire account with huge losses.
but in you case
The mother and the son after gambling away 5.6 million naira, that is about $8,000. When the reality dawned on them, they gave false information in petition, accusing someone of fraudulently transferring the fund from their Opay account to the sport betting account without their authorization.
The police should do more investigation and the court must make a wise decision and to be honest the mother and the son is made a big mistake when they gave false information and this gonna be a long trial