It is so nice that you are actually thinking about how she might be feeling about her birth experience. She is lucky to have you as a friend. Like others have said just let her come to you with her feelings. Keep in mind, at different times her feelings may change. For me, after a very long labour and things weren't progressing, the c-section was very welcome at the time. About a week later i started thinking about how things could have been different and blamed myself for how it turned out...so if this happens and she talks about the 'if onlys', just listen to her and reassure her. I'm okay now with how it turned out after having talked it through with others that have been supporting me.