My Daughter's Boyfriend

I accidentally read a slipn excerpt of my daughter's paper message, knowing that she is datinghas a boyfriend/is dating someone.

However, I think it's normal and understanding for a seventeen-year-old girl, s. She is growing up anyway.

I accidentally read a slip of paper my daughter's paper message, knowing left out and found out that she is dating a boyfriendsomeone.

It could also be “she has a boyfriend” but “dating a boyfriend” sounds a bit redundant.

Depending on what you meant here, it could be a “note” or “letter” too

I told it to my wife and she seemed a bit nervous.

However, I think it's normal and understandingable for a seventeen-year-old girl, she is growing up.