My girlfriend has decided to try anal sex, I eagerly awaited, here it is, while if it does break through for the first time

my girlfriend is very slutty but always a limit, is the anal sex, when I know I do every day works of persuasion to sfondarglielo and she finally let go and if he does put it in your ass faster that you can, feels like trying a little bit of pain and if it does break for good, even though it is the first time, will count especially with forever!