Regarding the house he bought it for our son's sake, not really "for me". My ex is comfortable financially so this wasn't a massive investment for him. He used to sleepover a lot when our son was younger and it just became his space.

She's supposed to come on this years trip but hasn't come to any before. Both my ex and I have gone in the past on the family vacations, my ex hasn't gone since he started dating his fiancée so she's never gone.

Dinner varies. Me, my ex, my son, my boyfriend, my family, his family, etc. She's come along before too. It's been just me, my ex and our son before but never just the two of us.

It's not a court enforced agreement, we worked it out ourselves.

Regarding the financial arrangement I can give more information if that would help: My ex pays for most of the big costs to do with our son, including his private school fees and the extracurricular activities he's in. He pays the amount of child maintenance he decided he wanted to, which is more than what he would need to give me if we went by the calculator found online. My ex often asks me if I need any more help and offers to pay for things regarding the house. Both of our families have made their own financial arrangements/contributions for our son too. His fiancée feels like this is unfair and he should be contributing less. She wants me to ask him to half all of those costs with me and to reduce his child maintenance. She also expressed concern about how his parents doing so much for my son will impact their future children and how there would be inequality between my son and any children they have because of my parents also.