A Weird Experience By A Relative

One day at twelve high noon, my sister was resting in our terrace when
she noticed our relative was walking back and forth near the century
old trees beside the fishpond which is at the right side of our house.
She was just observing him intently and wondering what he was doing.
She told my father of what she seen. My father shouted aloud advising
our relative to take off his shirt and wear it inside out.