<human>: Condense the text into a few key points

I would like to preface this by saying that I love my MIL. She has many lovely qualities and is a good person.

Okay, queue rant:

My MIL can be extremely self centered. It seems like every single conversation I try to have with her turns into a conversation about her! Very annoying! 
She has, on more than one occasion, kept me on the phone for an hour or more recanting her recent grocery shopping trip - Telling me every single thing she bought!

She and my FIL got divorced after 20-some years of marriage and, according to my SO, that's when all this started (or escalated, anyway).

She constantly tries to give us marriage advice (even though we are perfectly happy). And it always goes something like " oh honey, you don't want to do that.. I made that mistake with your FIL"

She was 15 minutes late to our friggin wedding because she scheduled her hair appointment for ONE HOUR before she was supposed to be at the wedding! I was by no means a "bridezilla" but, man, talk about stressing me out!

And ever since the wedding (one year ago), she has constantly complained that we don't visit her often enough. My husband and I have lived together for five years. So, other than expensive rings  and cheaper insurance, our wedding didn't change anything about our life. We see my MIL the exact same amount we always have. She is constantly laying the guilt on both me and my husband, saying things like:

"Now that you're married, you probably don't have time to....."

"You know you can still come see me even though you're married"

"I probably won't see you guys again for a month since you are so busy with your marriage"

UGH!

Anyway, my husband, my SIL, my MIL, and I are going on a 10 hour road trip together to visit some family soon and I just don't know how I will be able to handle her for that long in a confined space. I have tried to reassure her, I have tried being frank with her- Nothing works! My husband has tried to put a stop to it also! Neither of us want a 10 hour guilt trip.
<bot>: My MIL is driving me banana sandwich and I am going to be stuck in a car with her for 10 hours in the near future.