Is OTHER wrong in the post ? POST : Preemptive sorry for formatting on mobile.

So, my ex and I we will call her C, are best friends, our relationship ended surprisingly well for what happend. She left me while we were trying to have a child, for her ex now turned new bf. She had been visiting her mother out east and ran into him at random while out on the town (I can confirm this is the case) and realized she was still quite in love with him. She came home early from her trip and told me about everything and we broke it off.

They started dating again but were at this point an LDR, after a while he comes into our city to see her, and she really wanted him to stay with us. Problem is we live in a one bedroom apartment as no others have come available in our building, and we share the one bedroom between us (I work graveyards so I sleep during the day and she sleeps at night so we essentially take shifts.). 

I said no, citing that we may have stayed amicable and she was in fact still my best friend but I did not want them sleeping (and very obviously having sex) in the bed I have to sleep in. She got quite angry and we had a big fight about it, she was convinced I was just being petty about us having split up and that for them to Tay at a motel (or rather for him to) would be really expensive and something her new bf had not taken into account for his finances.

Neither myself nor C make a lot of money and I definitely felt for her but I just didn't want to have to sleep in that kind of situation.

AITA for not allowing my best friend and yet ex gf  to have her new be sleep at our place? Or was she off base?