Could be either. She doesn't look far off the weight of 'Oshine' the obese female Orang Monkeyworld rescued a couple of years ago and whose weight is now much reduced.
That's actually what I should have said! The number of overweight female Bornean orangs I have seen over the years that may or may not have been pregnant at the same time- well-its more than you could shake a stick at. The previous Twycross (ex London) female 'Twiggy' was a typical case in point.
If this is Kibriah who lost her last infant some months ago, she could well be pregnant again. If its Maliku she's presumably still feeding her daughter 'Molly'.