3 different letters

I sent my first Valentine and it was to an auntie inlaw and her daughter. My second letter was to a sister in law. i found a picture of her and the rest of the family when she was a girl. They all had their downhill ski’s in hand. I wrote to her about the joy of the winter Olympics in relation to our winter sports experiences in Minnesota. My third letter was to a cousin. I was writing this morning about a relative two generations older than we and I requested any other information my cousin may have about her. I wanted details.