Mother and brother annoying me ?

Last year my brother moved into a rented house with his friend and as the house was unfurnished my parents bought him a new bed. After about 6 months his housemate decided he wanted to move in with his girlfriend so my brother moved back in with my parents, they didn't have room for the bed, they asked if I had space for it, I live in a 2 bedroom house and my spare room was full of junk so I said no and my cousin agreed to store the bed. Once we had cleared out the spare room, we said we'd like to look after the bed now as it would come in handy if anybody wanted to stay over, so we took the bed and we've had it for about 6 months. Now me and my husband are expecting our first child and need to clear out the spare room again so I text my mother asking if she knew anyone who can look after the bed, all I get is "no, can't you sell it to your friend? it was an expensive bed " no help at all, don't know anywhere to store the bed don't know anyone that will buy it, she keeps constantly reminding me, I wanted the bed! so after a few sarcastic, slightly bitchy messages from both of us I tell her i'll sell it on ebay, there will be a student or a landlord out there that will want it, "that's a good idea, but your brother gets the money, its his bed." Would that annoy you? because it's really annoyed me, I don't know what to reply to that text. I was going to offer them the money anyway but I would have expected them to say " you keep it, you put all the effort in selling it" so when they can't be bothered to help me get rid of it I'm told its my problem because I wanted the bed, but now I'm going through all the effort to sell it I'm reminded it's his bed so he should get the money! He's so lazy! Can't be bothered to sell it himself but he'll sit back and take the money. I just need to finish this story by telling you my brother is 32 and I am 26 so it's not like he can't sell it himself he's just lazy! So is it my hormones, or would you be annoyed?