What's up with her dad?

I just feel werid going swimming at her house idk why but today I was standing outback while she swam and he came up behind me and poked my sides and said " boop" real loud And he always sits in the front room while me and her are in there and I can fill him staring at me and then she said when I'm goin he always asks "what's Kelsey doing" And kelsey is me btw