I inserted my penis inside her vajina for couple of seconds what r the chances she can get pregnant ?

In the blink of...: Life can change in the blink of an eye. It depends on what happened in those 2 seconds. If nothing came out of the penis in those 2 seconds, the penis could not have created a pregnancy. If a small droplet of semen with sperm came out, there can be a very small chance of pregnancy. If a squirt of semen came out, there is typical (guessing 5-25%) chance of pregnancy... unless she isn't ovulating.