Humping has a number of causes, but the 3 most common causes are: Sexual desire, asserting dominance over another, or stress/fear over something the dog is worried about. The latter usually manifests in the humping of objects though rather than another living animal/human, as humping even with out penetration can still feel good and release chemicals in the brain that help with relaxing or de-stressing.
Is your husky more or less dominant than the pup. Generally one dog will be in charge and the others will follow their lead. If the Husky is top dog, I wouldn't worry to much unless she is getting up in age and can't handle being puppy pounced. Provided she is physically fit and as bad as this sounds the puppy must learn his place and that may require getting a chomp by the Husky. I'm not talking about a full on fight you can't let things go to the extent a vet visit is needed, but... in dog society the way youngsters learn is to push their elders, testing their bounds until they are advised in no uncertain terms they have crossed a line and that line is usually patroled by growls, snarls, and lip curls. On the other side of that line are a set of teeth. Some pups get the point before things turn physical; while others require the point quite literally being driven into there head.
Now based on what you have said I am pretty sure the husky is in charge out of the two of them, but I will cover the alternate situation in case I have misunderstood you.
If the Puppy is trying to become top dog or already is because the Husky always lets him get away with doing what ever he wants, that's a bit more problematic. In this case you do need to intervene to make sure he doesn't hurt her. That is you have to advise him that you as pack leader are not happy about him picking on her to the extent he is. This can be done just by saying his name firmly and "NO!" to issue a warning and if he continues you need to calmly but quickly escort him from the room and close the door. He must associate his immediate previous activity with the result of being separated from the other pack member.
Give him a minute or two to settle and check on him, if he has calmed down again he can re-enter the room. If he hasn't calmed give him another minute or two and check on him again. The idea is to get him out of the hyped up state before he comes back in. If when he re-enters he goes straight back to annoying your Husky girl repeat the process. He should learn very quickly that overly rough behaviour leads to time outs
To a puppy time alone is very bad news, so after a few cycles of this sort of thing, provided you are consistent and repeat the process in a predictable way it will help settle him down a bit.
That said puppies have loads of energy and are notorious for driving everyone in the pack insane, with the prolonged exuberance they insist in sharing with everybody. So make sure you give him a little leeway to a playful puppy, before you start being cop and spoiling all his fun, so maybe let your husky girl draw that line when her body language suggest he being to much for her. But above all be consistent, Once you given the verbal warning you must follow through, if he continues breaking the rules you have set out. If you take him out of the room sometimes and other times let him get away with the bad behaviour it won't work and will be confusing to him.
As for putting him off sex if you reprimand him for humping your girl beyond her point of tolerance, don't worry, he will very much still be interested in her when she is in heat, no matter what you tell him when she is not in heat, pheromones are a powerful call to any dogs nose. That's assuming you are wanting them to have puppies. If however you are wanting him to only be mating with you as you don't want mini-woofers padding around, you will need to keep them separate when she is in heat, which can be a real challenge if they are both inside dogs that spend all their time with you when your home. Also there will probably be much howling involved if he can't get to her when she smells sooooo good. But this is a good time to offer him a substitute for his desires such as I don't know, you maybe.
So when your girl is in heat, you should be in heat also. The easiest way to switch his attention to you is to wipe her juices on yourself before getting down on your hands and knees and presenting for him, to sniff and lick, and mount you if he so desires, at this point all the standard stuff applies as have been discussed both in this thread and elsewhere.
Damn I type to much in my answers, but I hope something in all that was helpful for your situation. If I understand things though, the ultimate goal is to give him the idea that you get to hump her, but he only gets to hump you. Which in the wild is a super good outcome for any male that is not pack leader, as normally you don't get to have access to the bitches without taking out the boss dog and assuming his position and all the perks and responsibilities that go with it.