Enjoy every minute you have with your daughter when she is home.
My oldest son and DIL live only about a 2 1/4 hour drive from me. They are expecting their first baby. My youngest son and DIL live in China. My son was home in April, to see his aunt just before she passed away from cancer, then in May he was home for 48 hours when my mom (his grandmother) passed away. October they were home for her sister's wedding, so they didn't come home for Christmas. It was my first Christmas without him here, so a sad day for me, but also a happy day when I found out from my oldest I was going to be a grandma. I think they were a little homesick at Christmas. He called to get recipes from me for things that are traditional for our Christmas morning breakfast. Then he called Christmas eve and Christmas morning. They think they are going to sign up for one more year there. With all the thing going on in the world right now I would really like them home on USA soil.