This is a female pileated gibbon (Hylobates pileatus) with her three to five-month-old infant. Pileated gibbons are born blond, and later their hair turns black. Females' hair turns blond again when they reach maturity.
Here is a "glamor shot" of the female pileated gibbon.
And here is what an adult male looks like: black with a white brow and white tufts around his testicles. Notice how long his arms are; this is normal for gibbons.
This is a black-and-white photo of a Moloch gibbon (Hylobates moloch). These are also called the "Javan Gibbon" sometimes, because they're only found on the island of Java in the natural world. All gibbon species are endangered, and the Moloch is one of the most endangered.