Ex partner introducing new relationship too soon?

[SunRa]

My children's dad and I split over five years ago and I've been in a long term relationship for 4 and a half years. The kids live with me most of the time apart from one weekend a fortnight so they have a good stable environment here.

My ex was in a relationship with a woman for the last 3 years and she had a daughter in-between my two in age (12 & 9). They were all living together with Ex and my daughter and her daughter shared a room, were friends ect. Mid September he informed me that he and his partner were splitting up, I think she may have moved out around this time but until two weeks ago her and her daughters things were still in the house and my daughter was confused as things important to her step sister were still there (such as her teddys, the book she was reading).

He has been mentioning a new 'friend' for the last month or so and this weekend told me the kids would be spending time with his new partner from this point onwards.

I don't know the state of his relationship before or the reason for the breakdown so I don't know if, for him, it was a long time coming. But I'm concerned that for my kids, they have been told they won't see their stepmum and sister again, still had their stuff there confusing them and now meeting a new partner in the space of less than two months.

I don't have a good relationship with their dad but I do want best by my kids. My gut says this is too soon but I don't know if I'm unreasonable or should just keep my nose out? I'm doing my best to talk with the kids on my end but none of us know anything of this new partner so they're still quite anxious.

up to the dad to speak to them.

That must be really upsetting for your DCs to have their step mum and step sister disappear from their lives so abruptly.
But I don't think there is anything you can do about your ex introducing his new gf to them.

Very disappointing he would do that. He’s definitely putting them through a circus of transitions that can’t be easy on the kids. Do you have the kind of coparenting relationship with him that you can talk to him about it?

There’s very little you can do here, he’ll do what he wants. My ex went through a phase of introducing each new fling after a few weeks. I spoke to him and shared my concerns. He ignored them.
Both DC’s think dad is awful with women now as he dated so many and none of them worked out. It affected how they see him. That’s why DC’s rarely ever met anyone I was dating until many months down the line (mostly closer to a year).

I didn't think there was much I could do, I was wondering really if I was off the mark about his pacing and he was actually being reasonable?

I've done my best to help them through the sudden disappearance of their step mum and sister. My son has dealt with it better but he wasn't as close to them, my daughter really enjoyed having a girl the same age and a step mum who did 'girly' things with them. There wasn't really any discussion with the kids what was going on so the process was a bit confusing and I couldn't help with much of their questions. He has already moved on to chatting about his new friend.

I have politely mentioned the kids would appreciate a conversation about her beforehand to ease their anxieties but I think he'll ignore that and she'll be there all weekend coming up. At least it's noted what I feel is good for the kids I guess.

He's honestly so preformative and love bombs before the mask slips so I think the kids are actually in for a nice few weeks whilst he plays happy families, I've just been trying to prepare them that its probably temporary and to just enjoy it while it lasts.