Could she be on any medications (or topical creams or similar) which could affect skin colour or liver function.
I'm on sulfasazine which can give your skin an orange tinge.
There are other reasons for jaundice other than blockage of the bile duct eg a viral infection of the bile duct (hepatitis/glandular fever), damage to the liver cells eg alcohol abuse, tumors,.
Does she have any other symptoms and has she had other tests done eg bloods (liver panel, white cell count) or a scan?