looks fine to me , as long as you just feed them an appropriate sized prey 7 to 10 days it should be fine, a common mistake with these is over feeding.

I feed my adult blood every 10 to 14 days a large jumbo rat and he does fine but I am sure he would eat 2 of them given the chance every week lol

so in short no your Borneo is not too fat. What feeding schedule do you have and what size is she taking ?

Nice snake btw