Bleak House by Charles Dickens

If the secret I had to keep had been mine, I must have confided it to Ada before we had been long together. But it was not mine, and I did not feel that I had a right to tell it, even to my guardian, unless some great emergency arose. It was a weight to bear alone; still my present duty appeared to be plain, and blest in the attachment of my dear, I did not want an impulse and encouragement to do it. Though often when she was asleep and all was quiet, the remembrance of my mother kept me waking and made the night sorrowful, I did not yield to it at another time; and Ada found me what I used to be--except, of course, in that particular of which I have said enough and which I have no intention of mentioning any more just now, if I can help it.

The difficulty that I felt in being quite composed that first evening when Ada asked me, over our work, if the family were at the house, and when I was obliged to answer yes, I believed so, for Lady Dedlock had spoken to me in the woods the day before yesterday, was great.