Please tell me I'm not crazy?

My ex and I seperated last February. We have a kid together.

This week I'm house sitting. Sure I was told to do whatever I want.. like treat it like my own house, which is fair because I tend to be overly careful to the uncomfortable in other people's homes.

Today I passed by my ex's house because my son was crying and missed me tonight.

Suddenly my ex goes "what about we come over and we bring everything to make spaghetti and I'll cook at your dad's and we can visit, then our son's been at the house again as well"

I felt weird like.. you can't just invite yourself to someone's home when the owners aren't there, that's extremely rude and entitled.

Then he was offended because I didn't instantly say yes..

I don't feel comfortable having him in my dad's house when it's in my care.

He aparantly thinks this is the most normal thing in the world to invite himself to someone else's home when I'd housesitting?

It'd be different if I invited them, but I didn't.

I can visit grandparents with our kid next week, when they're back from their holiday and kid is in my care and he can actually see his grandparents.

@Melissa

It's not a "I'd consider that still my home"-situation. I've never lived here, it's the first time I'm staying here longer than 1 night myself.

@all

it's also the case that my ex is still trying to claim all my time. He's constantly inviting me over and inviting himself over to the point it's really annoying me. Every time he's still trying to put me under pressure to restart our relationship and I really want to keep the distance. I'm not even sure he'll leave if I tell him to leave unless I need to fight him over it and he's bringing 2 or 3 kids.. I don't want to fight in front of the kids either.

I just felt it's really audacious since I'm literally in someone else's house.. so you guys think that is really ok?

@Melissa

I forgot to answer to the first part of your response, my dad, though he thinks my ex and I should be in good contact for our child, is actually a little freaked out with how often my ex is trying to claim me and he's actually asked me several times if I'm ok and I'm not too freaked out by his pushy-ness. He would be ok with me inviting him at his home. But the key element would be "ME inviting HIM". The fact that my ex was offended because I HESITATED - I hadn't said no yet - gave me enough icks to say no.