Thank you for your question. A person cannot be separated from their past. Indeed, we learn from our past experiences and the lessons shape our attitudes to the future. Your future wife would not be the way she is now without the experiences of her past, and if you wish to have her as a partner you have to accept and be comfortable with that. It is not something you can force on yourself, but a decision you have to consciously make and be comfortable with. If you are not comfortable with it you have to address it, as in marriage there are many challenges and if this is always going to be a point of tension, it will damage the future of the relationship.
May you always be successful