Long pointless rant

My cousin who remains loyal to my aunt [the theif] moved in with her online boyfriend a few months ago. I'm enrgaged that my aunt [who obviously only cares about herself] would let her go and meet him. Everyone including herself claims he is a douche bag and a selfish pig. She is only 18 and she is suporting him. I have never been in love, but I'm just confused at how someone could admit from day one that the guy is garbage and still stay with him...? She got a large portion of the money my aunt stole from us, and she's blowing it on him...She said she wanted to go to college  ...But why should I care what she spends the money on? It's stolen money in the first place. I'm confused, should I be glad she's wasting all the money and then wont have anything to show for it in a matter of a year...Or should I try to get her to grow the F up and plan for the future?...Or just continue doing what I have been trying to do all along- forget about her completely? I continue to stress over this issue because I still can't get over my aunt and what she did to her family, and how she's not finished- she's using my cousin/ her own neice now.