My sister couldn't won't be able to throw my baby shower on time do I have the right to be upset?

Maria
Well to keep it short I am 35 weeks pregnant and when I was about 5 months my sister wanted to do a baby shower. I told her I wasn't sure if I want one but she insisted on doing it. She just recently told she won't be able to do it after I followed up with her to see what was going on with the shower because I haven't heard from her from some time. She can't afford to. I'm not trying to be selfish but I'm abit disappointed. Alot of people my husband knows offered to throw a shower for us but he told them my sister was going to do it. My sister said she wants to do the shower after the baby is born which I like the idea but I'm not too confident enough she going to follow through with it.