Baby shower

So this is my second pregnancy and I'm like the old fashion type that doesn't think you should have two baby showers and boys shouldn't attend. However the fathers mother won't stop going on about having a baby shower even though I've basically said I don't want to have one she just completely ignores me. So I told her if she really wants to have one for her family she can but I'm not inviting anyone and I'm not thrilled on the idea..And then she wants me to make and send invites and have it at my house, so not only is she pushing for a baby shower I DONT want but she basically wants me to plan it to. She's super pushy and over whelming and I honestly can't stand her and I don't know how to tell all this to the father without sounding like a complete Bitch. (My 4 year old daughters dad passed away before she was born so this is his first kid and her first grandchild)