My daughter is 26 and I would say this behavior (Drinking/Smoking weed) has been going on to some extent when she was about 18 (crashes first car). She got a full ride to a community college because she scored high in reading, but blew it, due to not showing up to classes, then lied about it to us. We kicked her out because she had her boyfriend stay the night and just not working. I have two other kids in the house, so then seeing this was not good.
Fast forward a few years, she lived with her boyfriend at the time, Mar's dad, things seem ok, they still struggled financially. She became pregnant, they move to a bigger place, that the boyfriends step-mom was renting to them at a discount. Then she finds out he's cheating on her. She moves back to our home, has the baby, Mar. When Mar is 4 months old she gets a job at a strip club, starts drinking heavily, has to reminded to take care of the baby, the room they are in is a disaster, clothes and dirty diapers all over. Doesn't show up when she says she will, and in general has no respect for other peoples time and still doesn't.
We kick her out again she gets an apartment and had a man from a strip club co-sign for her. She paid him to pay the rent, only he never paid, so she had to move out and left a bunch of stuff we gave her and Mar there. She was dancing at the strip club during this time, still drinking and smoking weed.
She moved in with my parents for about 8 months and did nothing but get drunk. They moved and she "stayed" with us off and on until from about March 2019 - September 2019 (when I found out she was pregnant). In August I told her this has gone on long enough and she needs to figure out her living situation by the end of September. My mom co-signed on this new apartment and my mom paid for December's rent. She has not paid January as of yet, which was due on the 1st. She can't live with us and the latest baby's dad doesn't want her at this house, but that a rocky relationship.
She says her new years resolution is to stop drinking and if it's too hard to do on her own she will consider going to AA meeting. She still has no job. The car my parents had loaned her was "crashed into" while parked at her apt so it has significant front end damage to the passenger side. This is the story she told my dad. The other baby's dad says that's not true.