My sister thinks that I need another air conditioner

My mom thinks that I need another air conditioner, however i would agree with her except that I don’t use my guest room that often, plus that is where she thinks that I should add a second air conditioner.

I understand that she would adore to not have to bring her air conditioner with her when she stays at my house, however I provided to let her sleep in my bedroom with my air conditioner, plus she refuses.

I told her that if she leaves the door open to the guest room it lets some of the cool air in there, but she says that she can’t sleep with the door open, but the only people that normally stay the night at my house are family plus close friends, so I offer to let them stay in my air-conditioned bedroom, plus most of them take me up on my offer. My mom just doesn’t want to stay in my bedroom because she wants me to have an air-conditioned space as well. I truthfully would not mind sleeping in the guest room though. It wouldn’t bother me at all. It would be less of a bother particularly because my mom would not complain about not having air conditioning system that way. I just don’t suppose that I can justify spending the currency on a whole modern air conditioner for my guest bedroom when hardly anyone stays the night at my house. I told my mom that if she really wants an air conditioner in there, she can buy one herself… She didn’t seem too cheerful about that.

electric heater