I am just summarizing current Oregon laws on divorce and child support obligations.  

I have no legal responsibility to support any of my kids after they are 18 years old.  

If I get divorced, however, then I am required by Oregon law to provide child support until the kid(s) is 21 and taking at least a minimal course load.  

I'm not 'encouraging' anyone to do or not do anything.

I'm just stating the law.