Betty only looks for certain people.
New in love teenagers.
So they don't have to go through what she did.
New mothers.
Since she never got to hold her own baby.
People going through suicidal times.
Since she killed herself.
Betty takes away teenagers having sex so they don't have to go through what she did. She takes the man and hangs him so it looks like suicide. She takes the woman and slits her wrist. Just like herself.She takes away sad kids so they dont have to deal with their pain.
She takes away new mothers babies hoping to care for it like it's her own but it ends up dying because she's just a ghost. She doesn't give it back to the mother because they dont deserve the baby.