Loving one kid more than the others

So my friend opened up to me about some feelings she’s been experiencing lately. So basically, she has 2 kids (girl and boy) from a previous marriage and about 6 months ago had a baby girl with her current husband. However, she told me that ever since her baby was born she’s had trouble loving and bonding with her two older kids (I believe they’re 6 & 8) and that she feels more love for this new baby than she does for them. What concerned me is that she said she loves this baby so much more to the point where she said she wishes she could just have her own new life with her new husband and baby and not have to worry about the two older kiddos (who are pretty great kids by the way) Am I out of line for telling her she needs to go to therapy? I really feel bad for her two older children and I’m afraid they’ll start picking up on her feelings. Do you think the kids will be better off with their father? I really just want to help.