Yay Dee!! I just realised the same thing a few days ago. I haven't been down to this weight since high school! Thankyou breastfeeding!! I seriously have not done any exercise, LOL.
Exercise? What is this thing that you speak of???

I reckon carrying my 8kg boofer is a workout in itself .... took him for a walk in the ergo yesterday and my abs and butt are still burning