try give her direct avise about what she needs to do with the poor old man. maybe she needs to hear something she havnt heard before from somebody before she wakes up from being a golddigger. lol and also, if she continue popping up at ur home without notice even after u told her. let her in fine. but dont be chatty and talk too much anymore each time she (uninvitedly) comes. until she feels shes not welcome and stop being a thick faced stealing u and ur partner's quality time