Stating who is paying or planning the shower on the invitation?

I am doing all the legwork and planning for a “small” (40-45 on guest list”) shower for my sister and my parents are paying a portion of money towards it. My mother INSISTS on me putting somewhere on the invitation “The shower is given by; #sister#, #father# and #mother#.” I find this unnecessary and somewhat rude, am I wrong? This is not a high dollar shower or formal event (such as a wedding where it does state who is presenting the wedding in the invitation).