So my closest friend is deciding to take a trip to the beach which is about an hour from us and I told her i don’t know if i’ll be spending the night and she told me if i can’t that’s fine but if i can the house is $120 for me and $120 for my S/O, so $240 if we spend the night and she said if im not spending the night then $60 for each of us for the house. Which i don’t think is reasonable considering we won’t even really be at the house? she mentioned a lot of day plans and exploring for the day of being there but not really being at the house and I feel like me and my s/o paying for $120 of the house knowing we may or may not even be there for 2-3 hours out the day is like really unreasonable!? AITAH for not wanting to pay!? I don’t know how to bring it up because i know from personal experience how stressing it is to plan your birthdays esp for even mini trips ( which she’s never attended any of mine) and i don’t want to add any stress or cause an argument so what do i do?

Edit - Id like to also include that I am a full time college student and part time worker with about 30 hours at work and she told me it’d be after finals but made this the weekend before finals on her actual bday so its another factor making me not want to go but i feel like an ass