My partner has a daughter from a previous relationship, and whilst I think the co-parenting and the civility in front of her is great, am I being unreasonable in not being comfortable or happy about "family days" that they spend together?
For background context, from long before the start of our relationship, he never spent these "family days" with his ex. At the Easter weekend, his ex asked to spend the day together as nursery was closed. It was also in the rota that my partners daughter was spending that weekend with us, and both of us were off work, and the plans were for us to do things together that weekend, albeit the activities were at that point undecided.
Without hesitation or thought, my partner said yes to his ex. He then sat on it until before bed to tell me about it. He also said that if I didn't want him to, he would make something up and not do it. I told him I was uncomfortable with it and would prefer that he didn't do it, but the more I expressed this the more he dug his heels in. He went, spent the day and had zero communication with me for the entire day.
I understand the need to spend certain points together, like the morning of her first day of school, but I don't feel there's a need to be spending these 10hr days together that he hadn't done since long before our relationship started. It's something that keeps coming up and is driving a wedge between us.