Some Opinions Needed On A Virginity Question?

Me and my girlfriend tried to have but im big and shes still a virgin like me so it was painfull and were not sure if i got in, the next day she said she wanted to lose it to someone who knew what they were doing, we plan to get married and everything and it means extremely alot to me we lose it to each other am i wrong for asking her to endure the pain for me