Sunday afternoons, my sisters and I usually spend a bit of sister-time. Now, it's just Miriam and me, but we still take time Sunday afternoons and do stuff together. Sometimes, we just talk, other times, we watch a movie, or drink coffee, or any number of other things, but we usually spend the afternoon together.
Now, I don't know where you're at in life, but if you have sisters at home, take time with them. Now, two of my sisters are married, and it's just Miriam and me, and I cherish the memories with my sisters. I'll never regret the Sundays I've spent with them. (Or any other day;)) Time spent with family is well spent time.