The raid on the Holgerson's house is to try to find a way to stop Holgerson from taking advantage of Amber and bedding her - so not a set up.
Illegal street racing - something Bella does with her friends including Ayua and Eva - so unless you are claiming that every girl who does illegal street racing is intentionally setting up their families, - no set up.
Possession of drugs at home - there was no comment made about the drugged candy being illegal - just unexpected by the MC (and Amber did not seem surprised that Bella had the drugged candy, only embarrassed that he took some accidentally) - so no set up.
If you want to find fault with Bella - have at it.
We all get our opinions about who and what she is, but I disagree that Bella is setting up Amber with any of the three activities that you mentioned.
There is a major difference, IMO, between Bella intentionally setting up Amber versus some future event taking place that puts Bella in the crosshairs of consequences due to her actions.
Can future consequences undermine Amber's reputation - OC - but that was not your original premise.
Your original premise was:
'... and without a second thought sets up her mother.'
So - again - no set up.
Cheers!!