Wants to marry a girl who has repented of her past but his mother does not approve

AS SALAAMU ALAIKUM
I am interested in marrying this sister, that my mother doesn't approve off. My mother doesn't feel she is the right one for me. I am a virgin and the sister has a long sexual history. But I can tell that she has changed her behaviors and is practicing this deen better than i am. I would like to know, according to the Quran and Sunnah, is it a good idea to marry this sister.
I am humbly awaiting your response
AS SALAAMU ALAIKUM