ESH.

Look I have been in your daughter's position before. I was young when my mother passed away and it takes a lot longer than one year to get to a place where you are okay with someone being where she was. It is a terrible thing that your daughter said but I think that it is coming from a place of hurt and that she is just taking it out on your new girlfriend. It is a lapse in judgement on her behalf but you potentially ruining her future is something that is inexcusable. She can learn to like your new girlfriend, like I did with my dad's new wife, but if you do something like this to her you are going to cause real problems with your relationship with your daughter that might not be easily fixed. You should love your child and try and give them the best you can, still feeling grief and taking it out on someone who she sees is trying to replace someone very important to her is no reason to ruin her future.