You hold your hand out, tipping it from side to side as if balancing something.
"That's the pros, as it were. The cons..." You grimace, exhaling slowly. "Or, well, the risks. I'm worried she'll be hurt by the knowledge, and be isolated by it. Granted, that would be three of us in the know, but then there's Mami, Hitomi and Madoka who aren't in the loop, and I know what you think of that."
"Don't drag Madoka into this," Homura says, her jaw tightening. "I don't-" She breaks off, and shakes her head.
"I don't..." Homura squeezes her eyes shut. "I don't understand Sayaka. Not this time."
"I..." you exhale. "She's the same person, the same as she's always been. The only thing that's different is that we've managed to give her a different impression this time. And yeah - I say we, because you played a part, too."
Homura sighs, eyes sliding off to the side. You're tempted to start explaining more about Sayaka, but you can see she has something on her mind, too, so you give her a moment to let her work it out.
"Don't drag Madoka into this," Homura says again, this time at nearly a whisper. "I- what about Mami?"
"Hm?" you ask.
"T-telling Madoka," Homura whispers. "Telling Mami. You don't want to tell her. It's the same."
It's not. It's not the same, not really. But here's Homura, trying to resolve things with an emotional appeal, an attempt to find common ground.