Okay so im a male and my female friend/not that close friend asked me to come swim at her pool alone. She told me she couldn’t swim with out someone being there( she was 17 and I am 17 and I saw her swim before she isnt a beginner like there is no risk of her drowning) also her family wasn’t home. At first I thought nothing of it but thinking back I find it a little sus. What does this mean?