Geez she is already pregnant so thats a tough one, i would have originally said let her move out and figure out for herself how tough it is on her own but no doubt she would have to move back in with you soon enough anyway because having a baby with no money will be too hard on her.

I think let her move out now so when she does come back (i guess that is definate) she will appreciate you and your household plus how much you are doing for her much more. If she stays now she is likely to take it all for granted.

Part of me would tell her to just deal with it and do it herself but there is a baby involved who needs a proper environment to live in. That is a really hard situation.

Do you know anyone with a small baby that she could go visit for a while? If she gets the chance now to see what changing nappies, feeding, getting up all hours of the night, constant cleaning & changing involve there's the chance she may realise that it's gonna be hard & she's going to have to get herself sorted.

Do you know her boyfriend's parents? Could you have a chat with them so you all present a united front?

Does she want to come home to stay after the baby is born or does she want to live with her boyfriend somewhere else?

I was 18 years old when I had my son. I was young and naive and I thought I knew it all. I was living with my boyfriend at the time of my pregnancy (My exH), and didn't want to live with my parents. After I had my son, I suppose my motherly instincts kicked in and I knew that I needed help, that I was too young to deal with such an adult decision. My desire to be away from my parents and be independent completely left me. I had no clue how to take care of a baby.

I'm very thankful that my parents let me come home, without my exH of course because we weren't married at the time. I didn't have to fall flat on my face to know that this was something I should have been more careful in preventing, but what was done was done. I needed that time to learn how to be responsible, and had my parents not allowed me to come home, things in my life could have turned out completely different. When I left my parents home after about a year, I had a steady job, got my own place, and was able to raise my child without the help of my parents, then I built the rest of my life from there.

I currently have an outstanding job, purchased my home, I'm very financial conscious, have two wonderful children, and a great DH. The fact that my parents allowed me to come home after I had my son did not ruin me, but only made me a better person and a better parent.

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“Unless commitment is made, there are only promises and hopes; but no plans.”

I had a baby 3 days before my 16th birthday. My mom kicked me out of the house as soon as she found I was pregnant. I had to live in an apartment that was used to sell drugs because my BF and I had nowhere else to go. He was a lot older than me and he had a job. We struggled for a while but my baby never did without. If my mom had not done that to me God knows what a loser I would be today. I had to learn the hard way. I had to work at a fast food restaurant while my BF worked as a mechanic. We lived in a room that was the size of what is now my walk in closet. My pride did not allow me to ask my mom for help. The day she kicked me out I swore to never return. I spent many years struggling to care for my baby but today I make well over 6 figures, I own my own home, I have 3 wonderful boys and a SS. I have a great DH and things are as they should be. I have even made peace with my mom, who I had severe issues with for a very long time. What I'm saying is, don't make it easy on her, she will not appreciate how good she has it until she struggles for a while. You can always let her struggle a while and then help her out when she gets stuck.

There can be no worse situation to be in than a parent to a kid who is as you desribed and I don't think helping her will actually help her. Sounds to me like it may be better to wait until she has the baby and help the baby ( yes I know that sounds cruel) but you could start by calling child protective.
If it were me........................... I would offer to help her by
adopting the baby or making sure the right family adopts it. I would not help her as I feel from her situation, it would be a losing battle and you are going to ends up taking care of the baby anyway. You might as well set it up right from the start and you should ask for child support from both parents...
it will help them understand the concept of using birth control or absitinace.
I mean that in not a cruel, cold way but a realistic one.
If this was the situation with my kids or step kids, that is what I would do.
In my case specifically I would make sure the right family adopted the child since they cannot provide for themslves let alone a child. I am too old to be raising kids, but I do know there are many families who aren't and can provide a loving home with everything they need, like medical insurance, a clean enviroment and healthy food to eat.. safety too.