Evidently she is quite a bit more experienced than you! No, there is no chance of pregnancy from what you describe. It’s time for you to buy some condoms and become familiar with their use. Age and bad storage are issues. Don’t keep one in your billfold or car glove compartment. Wear anew one for each act and reach down to make sure it comes out when you withdraw. Don’t go back in for a second dip, there is still some semen left in your urethra. Happy hunting!