is it faux pas to throw a baby shower for your second pregnancy?

Stephanie
My sister, who threw my first baby shower, is under the impression that it is faux pas the have a second baby shower. 
She thinks that I already got everything I needed from the first one and that I shouldn't need anything else. 
My daughter will be three in October and to be completely honest I didn't save bottles from when she used them. And diapers obviously have already been gone through! 
I feel like since this is a new baby and the new baby will need new/separate things that I should be "allowed" to have a baby shower. But maybe I'm wrong? 

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