Leo's going to tell them about the dreams. He will. Just--not yet.
Mistress Kitsune and Master Shredder are both very busy running the clan, after all, he takes up enough of their time as it with training and planning and...other activities. Bothering them with something as silly as a dream is ridiculous, downright selfish.
Chances are Karai's no doubt told tales about the dreams, but Master Shredder hasn't said anything, so it must not be important. Really, if he goes to them, he'll just be drawing more attention to an inconsequential problem and possibly fueling her attempts to undermine him.
But Karai doesn't know what you're dreaming about, a little voice whispers at the back of his mind. She doesn't know about her.
There's nothing to know, he shoots back. It's just some dreams he's been having about a garden, and the woman who lives there, and the scent of cherry blossoms that stays in his nose for hours after he wakes up. Dreams of her hand on his face as she tries to hold back her tears, as she whispers words that buzz strangely inside his head.
Dreams about blood, and dirt, and his brothers dying on his knees, and the ache of rope around his wrists, and his master calling him traitor as he raised his sword--
"Shut up," Leo whispers, slamming his foot down with too much force as he cycles through a kata. "Just shut up." He catches Alopex looking at him out of the corner of her eye, but she doesn't say anything.
After today's lesson, he tells himself. He'll get Master Shredder alone after today's lesson, maybe ask for some time to go talk to Mistress Kitsune, and everything will be fine. He'll get this all straightened out and they'll give him something to help him sleep.
Leo wins all of the day's training fights except for the one with Master Shredder, and even then he does a decent enough job. He's proud of himself as he goes through his cool down exercises and exchanges his traditional dirty looks with Karai, his nod with a still-quiet Alopex. Master will be in a good mood, he hopes.
He's still working up the courage to approach Saki when the man beckons him into his office. Leo swallows, straightening his back as he approaches the door, telling himself they're just dreams, don't blow things out of proportion, it's just dreams. 
"Master, I--" he says as the door closes behind them, and then he's being shoved to his knees. Saki locks the door and turns to Leo without a word, pulling out his cock.
Oh. He was right, in a way. Master Shredder is in a good mood.
Leo leans forward without complaint and takes Master Shredder in his mouth, hair tickling his face as he gets to work. He's gotten very good at this, worked hard on managing his gag reflex and using his tongue when he sucks. 
Master Shredder ends up fucking his face again, hands snarling in Leo's mask tails as his hips snap and jerk. It's kind of uncomfortable, but Leo sternly reminds himself not to complain.
When he closes his eyes, Leo sees a garden. Shredder's seed fills his mouth, and he could swear that the fresh smell of sex in the air has a hint of cherry blossoms.
Afterwards, he spits in a trash can and stands up carefully. Master Shredder starts to turn back to his notes, only to pause, eyes narrowing with recollection. "Did you want something, Leonardo?" he asks.
Leo blinks. Say it, he thinks. But Master Shredder's mind is already on other things, isn't it? And right now, a little thing like a bad dream feels irrelevant in the face of his master's needs, his  all-consuming will.
"No, Master," he says honestly. To be honest, all he wants to do right now is go gargle water, and maybe track down some mouthwash.
"Then you are dismissed."
He bows and leaves, slipping back out in the dark halls of the clan. I'll tell him later, at a better time, he tells himself firmly, and he more or less believes it.