Mother in laws...

How do you guys deal with mother in laws while being pregnant??? My mother in law is trying to cross boundaries.. She showed up at my first doc appointment uninvited and now she will NOT leave me alone about throwing baby showers (which won't be until at least August!!) and she keeps trying to throw me a baby shower with only HER friends & family... Not mine, just hers. It's sooo fustrating, she gets her feelings hurt too easily too & I don't wanna be mean but this is MY baby, and I've only met most of her family (her in-laws) and friends just once... Does anyone have any advice??!!