Got an unfit mother pregnant. She's 40, I'm 23. She already has two kids who have been through hell and back and are completely dysfunctional. I'm also normally not okay with abortion but she was drinking heavily up until she found out she was pregnant (6weeks) so the fetus is probably already messed up.

I weighed it up and I think the cost benefit of an abortion are in favour of having one. How do I approach this to get her to have one? Specifically how should I word things that will have the effect of influencing her decision the way I want?