Ha! Ha! LHG,
It wasn't just sisters looking for Guys. Believe me, I saw and experienced plenty of Teenage and older Males trolling as well. One time a brother I had known years before in a different town came up to me at a DC and started flirting. He asked "Are you still married?" "Yes" I said, disappointed, off he went to find another possibility.
Turns out he found an older sister and they married. His 3 years younger brother married her Daughter! This was about 30 years ago. I wonder if They are still married. LOL