The 2 are very close but I think the exact facts determin whether its jealousy or envy. You can have all the time you want with your parents and not actually want any more (No envy of your sibling) but still be jealous of the time they spend with your sibling. The fear is that they become closer to your sibling than to you. Same with the promotion, you may not want your collegue's job, or may even have the same job but still feel jealous because you are now not as important as you were. Both situations could also be envy though, if say you wanted more time with your parents or you did want the promotion your collegue got.