My father in law has full hairy body,even my wife has a tiny hair on her body.what are the chances to me to having hairy kids?please clarify...

Hereditary body hair: Increased body hair is common in people with some ethnic backgrounds. If you wife and her family parents are hairy, your kids have a higher chance of having increased body hair too. There is no way to predict the chances that each child will have this.

Very small.: Your father-in-law's lush body hair is a combination of heredity, puberty and testosterone. Male children who have inherited this tendency don't express this trait until well into puberty. Female children will develop pubic hair during adolescence but they won't be hairy like their grandfather. Your chance of having "hairy kids," a condition called hypertrichosis, is very small.

No telling: not sure you can predict based on this information but would not blame your wife if your kids are hairy. It may have played no role. Male pattern baldness appears to run along the maternal line. I would prefer hairy over baldness myself!!!