My gf cut herself after I found out she cheated on me

just recently found out my gf cheated on me around a year ago during a super rough patch in our relationship. I just forgave her today, and found out she cut herself bc she thought I was never gonna contact her again/she hated what she did to me... I felt super bad abt it; I immediately went to the store and got her scar ointment for it. Although I don't think it's manipulation, I'm not sure... I ended up forgiving her; but I don't know how I feel about her actions. She didn’t mention the cuts until after I talked to her/forgave her.