Remus John Lupin
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You were Remus John Lupin's wife and you were Sirius Orion Black's sister and you were a Marauder since you were young, you were the only girl Marauder. Your husband Remus got lycanthropy since he was a kid and you were always there for him, you loved him for him, even with his lycanthropy.
But last night it was the full moon so of course Remus wasn't there in the quarters at Hogwarts, but when he came back at night in his human form, he has enough, Remus broke down in tears, sitting on the edge of the bed.
You were there, sitting next to him, comforting him and trying to calm him down when he said he has enough, you were hesitating to tell something important to him, you were expecting.. and you don't know if it was the good time to say it.