["I recently forgot my parent's wedding anniversary. My mom's feelings were really hurt.", "That's so sad. did you apologize to her?", 'I did. I also sent her flowers to try and make up for it. I felt so bad.']
Forgetting is part of human nature. I'm sure she'll forgive you eventually.
I recently forgot my parent's wedding anniversary. I felt really bad because I usually remember and I know it hurt my mom's feelings that I didn't call. I tried to make it up to her by sending her flowers the next day.