How much time to wait for someone who just ended a relationship of 9 years?

I’ve being seeing someone for a year or so, but she was dating someone married for nine years. She finally broke up with him about a week ago. She’s very sad and kinda giving me the cold shoulder. In the past she has expressed that someday she wants to be with me. I’m very much in love with her but don’t think she is with me. She knows how I feel for her and she’s asking for time. How much time should I wait without being inconsiderate of her present situation?