Nearly 2 year old extremely clingy to Mom and very mean to Dad. If yours was similar, how long did it last?

I have 3 little boys who are 5, 3, and almost 2. My 5 and 3 y/os never had a favorite parent (or at least it wasn't obvious). I'm a stay at home mom and my husband works 6-7 days a week.

Little man will be 2 next month. For the past 2-3 months, he's become extremely clingy to me and is very "mean" to my husband. My husband can't look at him, touch him, or talk to him without him screaming bloody murder and running to hide behind my legs. Now, to be clear, he's like this to everyone that isn't me. Grandparents, strangers, everyone. It's nothing that my husband has specifically done. My husband does not handle the discipline (because he is working during the day) so it isn't a case of mean parent/fun parent.

It's hurting his dad's feelings, of course, being treated like a stranger. And the extreme clinging to me is beginning to drive me up the wall. He's jealous of his brothers and any attention they get. He gets upset when my focus is on any task except for him. If I'm cooking or cleaning, he's clutching my legs and screaming. Now, I don't usually give in to his demands. I don't stop playing with/holding his brothers when he is jealous and I don't stop tasks when he wants my attention. And I give him plenty of attention, playing, and cuddling when I am not busy.

The constant screaming for me is causing another issue as well. My 3 year old son is autistic and nonverbal. Occasionally the little one's screaming and tantrums will throw my 3 year old into a full blown meltdown, covering his ears and occasionally trying to bang his own forehead into the hardwood floors.

My husband and I both keep telling ourselves that it's a phase that will pass but it gets WORSE, not better with each day.

Having my husband spend more time with him alone is nigh on impossible. He rarely gets a day off work. My 3 year old son has therapies for an hour twice weekly and my husband is home with the 2 y/o and 5 y/o during this time. So he does get at least 2 hours a week of guaranteed time with the 2 y/o where I am not present. He says my son is not mean to him when I am at therapy with my 3 y/o or when I have to run errands.

Until my husband isn't on constant over time, more one on one time isn't really an option. Which means I'm just basically having to wait it out right now. If you were in a similar situation with your little one, how long did it last?