My (ex)husband and I have been separated only since the end of last year after over a decade of marriage and are heading towards divorce. I'm the one who initiated the separation and he was and is very against it and is still very bitter about my decision. He basically flip flops between being angry/berating me and trying to get back together (flirting and being overly friendly).

Now our children as well as his teenagers from a previous relationship are all mostly staying with me, because dad is out traveling for work a lot and also doesn't really have space for them at his new place. I'm of course happy to have all of them with me.

Now as part of the separation, we also moved to a new place and it's still quite plain. I'd love to give it a proper makeover and make it our own. As part of that, I'm thinking to do a proper photoshoot for the 5 of us to have some new and nice pictures to frame and hang up. I'm thinking to go all out, like doing it professionally with matching clothes and all. I'm sure the kids would love it and be excited about it too, especially since we do not have a lot of pictures all together.

Now I have not yet brought up the idea, but I know my ex would absolutely hate this, especially if I'm including "his" family (my bonus kids) but excluding him, because he just does not want to accept that our separation is final and also because we never did this when we were still together. Now of course I also don't really want to do anything that could shatter the fragile peace we are trying to maintain for the sake of the kids.

I've thought about some potential compromises, but all of them feel kind of wrong. For example, I could include him in the photoshoot, like having him take photos with the kids, me take photos with the kids and the kids alone, but I know he will push me to also take one all together and probably also misinterpret that as a sign that I'm interested in getting back together. Or I could just do a photoshoot for the kids, without me in the pics, but would also love to have one together. I'm thinking of maybe just doing something casual, like taking all kids out for a daytrip and just snap a regular family photo instead of a full blown photo shoot, or maybe waiting a year or so until he has maybe moved on (?) but WIBTA if I just said fuck it, I'm not responsible for his feelings anymore and just went ahead with the photoshoot without trying to do any damage control? I'm already tired of tip toeing around him all the time, but I also feel like I may be an asshole to both my ex and the kids if I just go ahead.

TLDR: I would love to do a professional photoshoot with my kids and bonus kids, but I know my ex would be pissed. WIBTA if I just went ahead without considering his feelings?