Don’t change your plans. Don’t let her dictate what you both choose to do. The date is significant to you and you are not raining on her parade by having your wedding two months before hers. That’s ridiculous. I agree an information diet sounds appropriate. I’m not sure how the in laws are, but maybe that will mean telling them less details? Just make sure you’re on the same page.
Congratulations! Veritek, love the ring.