I sent W a text Friday that said verbatim I will think about it and let you know when I decide. When she dropped the kids off this weekend she asked me again this time face to face. I responded that I was still thinking about it and will let her know when I decide. She tried to pressure me and said she doesn't want the responsibility and wants to do something about her dog soon. I just said I will let you know.
When D8 talked about it last night I told her that yes its true that I told Mommy I would think about it and let her know. I asked D8 what she wants and she said she doesn't want to lose her dog and wants it to stay with Mommy. D8 said she wants Mommy to send it to obedience school (dog is barely 1 year old), but W told D8 she doesn't have time for the dog anymore. I validated D8 feelings about it, but left it at that. I will wait till after D8 bday before I give an answer to anyone.
TF, you don't want the dog, right? Why did you tell W you'd think about it? Why is this your problem just because she "doesn't want the responsibility?" Sounds like HER problem to me. Put it back on her, tell her "no" and leave it at that (don't offer lengthy NGS explanations). You'll have to deal with some fallout from D8 since you told her you were thinking about it, but better that then 15+ years of living with a dog you don't want and probably won't love (and may resent since it's your W's).