need help (young dog & new puppy)

I still need your help and suggestions because I'm afraid I'm missing something here that can lead to bigger problems.

Yana, my 13 months female, does not want to accept our new puppy, Anton. He's been with us almost for a week now, the sweetest puppy possible. He is not pushy or bity, he does those play bows and runs to her to play, wants to lick her face, turns his head away, shows his belly, he tries so hard to please her.

Yana is better with him in the yard, kinda trying to play with him (I'm supervising all the time so she doesn't hurt the puppy). But inside of the house she's turning into a different dog. She sits in her crate all the time, refuses to eat on her regular place, picks up toys and takes into her crate, growls and bares her teeth towards the puppy... She also goes nuts when the puppy approaches her crate and my tiny puppy starts barking back at her. Her hackles are up every time when she sees the puppy approaching her.

Also she started going on the couch even though the dogs are not allowed on the furniture in our house, and she never did it before. Worse, she didn't go down when I told her and I had to take her down by the collar.

Yana is a super submissive and fearful dog with very weak nerves, and I don't fully realize what is going on here. She never bared her teeth or growled at dogs or people before. She does receive her usual exercise, walks, attention, I'm taking a comp. obedience class with her and have training sessions with her during the week. But she hates the puppy and it has to stop because I don't want my brand new dog become fearful and dog aggresive because of her.

Please help me to understand what is going on in our house and how to resolve the situation. Please don't suggest to find a trainer because I've already tried 3 trainers here seeking help with her and nobody could help.

Thank you in advance!!!