My mother is crazy

Talking to her sometimes is the most bizarre thing ever. I feel like I'm on drugs half of the time (and the other half, I really am) She just has such an odd way of putting things.
My mother said to my sister today that she is "saving my money to have a shopping trip to Bellingham as momma needs some new clothes" The momma part she said in husky southern drawl. She said it seriously. I don't know how she expects us to take her seriously.
Beside the fact that my mother does not need, in any way, to save money for a shopping trip, was she trying to imply that she and her husband were going to have sex on this shopping trip? We didn't quite understand and my sister just absolutely has a bird with any mention that my mother has sex. But in my sisters defense, my mother has been known to say some truly vulgar things in public.
When I first got my drivers license, my mother and I were at a stop sign next to some older highschool guys and my mother, to my extreme horror, rolled down her window, leaned waaaay out towards the guys and YELLED "HEY GUYS! ANYONE WANT TO DATE AN OLDER WOMAN?" I died 1000 times right on the spot. She just laughed and rolled her window up.
Another time, at my highschool graduation party, my mother who was liquored up, sat on my friends lap, and told him she was a 'slut'. I know how truly horrible that sounds but I do have to say that the word 'slut' around our house was a humorous word that we all used for various reasons, including naming the cat 'slutface'. Just writing it now, I see where all of my problems have come from.
Anyway, I think my point is made about my mother being crazy.