Little bit of background myself and my DH had been together for 20 years married for 13 with 2 children together. We had I admit fallen into a bit of a rut with the mundane life unequal family split/etc and had become a bit bickery as a result. He had in the last about 2 months spent a increasing amount of time with his sister and her best friend drinking excessively and from this he had begun stating he was unhappy in his marriage and despite saying there was nothing going on with the other girl wanted a divorce we have been muddling through with no real resolve until things came to a head almost 2 weeks ago and he lied about where he was and went drinking with his sister and this other girl and didn't return home all night despite my pleas to do so. I therefore asked him to leave which he did and has been living at his sisters since.
Once the storm has calmed down I have almost begged him to return its massively affecting our children our eldest especially was already on a mental health pathway and this is killing her she just wants her parents together. I feel after 20 years we owe it to ourselves and our children to try to change and really invest in the marriage, try councilling and talking but he point blank will not now consider this and wants a permanent split.
Now comes the AIBU in 4 weeks we are due to fly abroad with the girls for a trip with his mother and his sister which has been paid for by my mother in law. He still wants to go on this trip with him staying with his sister and me with the children but still spending all our time together with his family or failing that for him to fly with them without me. Am I been unreasonable to feel the best solution given the current situation is to cancel altogether. The children need their mum neither wants to be away from me, I also have concerns around the drinking with his sister and general behavior given its what has had a massive hand in the breakdown of our marriage. I however cannot see a amicable way for me to holiday with his family without that also impacting the children.
AIBU to cancel the trip altogether despite me not having paid for it and knowing it will upset my children?