Should we confront this behaviour?

[symbioticsoul]

I’ve lived with my partner for 4 years,I’m 50,Dp is 62. His sister (65) doesn’t like me, but is fake nice to my face. This Christmas she decided to cancel me and sent a Christmas card to my Dp without my name in, with love from her, her husband and her dog…she has included the dog as family, but not me.
My Dp felt hurt by this, and as we we’re busy over Xmas he ignored her, she kept sending messages every few days to him,mainly photos of her dog and what delights they have been up too, completely ignoring that he wasn’t replying. Eventually she messaged my 21yr old SD and told her how she was desperately missing my Dp and could she get involved… (she wouldn’t,Dp already briefed her)
Now my Dp has sent an email explaining how he’s hurt that she chose to exclude me and I’m his life partner so she should include me out of respect for him, and pointed out multiple other occasions that she has been snidely nasty to me. But his sister has completely ignored his email, went silent for 4 days then just started sending the usual lovey dovey messages again like nothing happened!
What do we do? Let her brush it under the carpet like it never happened? Or should we try to confront her again? (This is,I believe the first time Dp has ever confronted her about anything) she is quite dominant and manipulative.

Dp could block her..

I'd just not engage until she either loses her shit and forces confrontation or apologises.

Your DP has done the right thing, ball is now in her court. He needs to stay disengaged until she addresses the actual situation appropriately.

Is she jealous of you? Does your DP have any other siblings, and if so how are they with you and vice versa? If she is the only sibling, I think she might be envious of you and your lifestyle or something. Did she get on with your DPs ex (assuming this since you mention a step daughter).

Just trying to get a picture of the family dynamics here because on the face of it the sister's attitude towards you is very bad, but thankfully your DP has your back, which is good.

I would be inclined to ignore her.
Hour partner has already addressed the issue with her so if you both ignore her , going forward, then she'll eventually give up.

She's clearly playing a nasty game, don't take part.

@couiza , no she's his only sibling. He was married before, his ex wife also had a very difficult relationship with her.

He needs to be unequivocal that if she is disrespectful to you, then their relationship is over!

@couiza you might be right about the jealousy, but I've never got in the way of their relationship, always encouraged Dp to spend time with her.