Went for dinner with my parents Dsis and get fiance. Those two have been together 6 years so he is pretty much a part of the family now. They were speaking about getting a place in the lake district like a cottage to share. Asked me if I could come and I said really not sure if I can afford it. I'm a single mum with a ds3. They said oh no it will work out it's 30 each for the 3 nights and convicted.me to come. I said ok then yea let me know. Nothing was said since. Today i just found out my Dsis fiance has booked a hotel with my parents that's 400 for the 3 nights. However nothing was mentioned to me. Apparently the cottage wasn't available, that's fine but instead of telling me and saying we think we might go here instead they said nothing and booked the hotel. Just feel upset and pushed out. This is not the first time I've felt like this either. AIBU?