I'll try not to make this too convoluted. My partner has a nephew who has an ex-girlfriend who he has had 2 children with. So I'll refer to her as ex-GF and the nephew as 'my nephew'.
Ex-GF met my nephew at 16. She soon fell pregnant and had a baby. She was living with foster parents at the time and moved to a new mother and baby placement. All was going well until the baby was about 6 months old and Ex-GF had a close bereavement that really affected her mental health, she was removed from the foster placement and eventually the baby was adopted. During this time the relationship had been on and off with my nephew. We were all very sad about their little girl being adopted and of course it affected my nephew and Ex-GF a lot. They ended up getting back together and about 6 months later she was pregnant again. Their relationship broke down again but as we did with the previous baby we continued to support Ex-GF, especially as she has no other family. She has done really well and moved from a mother and baby foster placement to a mother and baby home. Her little boy is now 18 months and she is hoping to get her own home soon. Tonight she told me she is pregnant again. I didn't ask who the father was but she isn't in a relationship. She is only 20 and is having her 3rd child and with no partner to support her. I am worried how she will cope with 2 but more so just concerned about this pattern continuing and her having more children and making her life much more difficult than it needs to be. She is very vulnerable and from what she's told me she is repeating what her mum did having lots of children with different men and no stable relationship. It's not the time now to discuss it but I wonder should I try to talk to her about her future or is it none of my business. I care about her a lot and just hate to see history repeating itself.