missAlabama, I'm your age too, size 8, sometimes 6, but shorter, And i have long hair, always get told I look like I'm in my mid 20s,very recently by a cosmetic dermatologist,
You are really too young to be thinking about these issues, you have 4 kids to look after,I can't imagine that being easy? You must be sleep deprived too,
Being thin doesn't equal looking haggard, sometimes yes it happens if you were overweight in the first place and lose a lot, sometimes things don't shrink back, just like excess skin, sometimes its excessive smoking or drinking, which is worse as they work from the inside out, so the damaging is not just superficial,
Yes, I agree Pilates is really good for toning,skinny fat,which seems to be your issue, plus weight lifting, I've completely stopped running, and just do Pilates ,weight lifting, biking, and I see no difference, still in shape, except my trainer says that my boobs will be greatful in a few years time
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Keep up with the good eating, introduce good fats like salmon, avocados, nuts , cantaloupe , they help with the renewal of skin collagen, and see how it goes, maybe all you need is just a few lifestyle changes,