Friend's With Management Continued

Hi all! No I haven't fallen off the face of the Earth. Sick again though. Ear infections and no medical this time though. Oops.
L and I came up with this great idea to expand both of our businesses. She runs a skin care and make up workshop every couple of months in an island town that she used to work in in. They have a 'coming out' party and a fashion show. Where I come in is providing some of the clothing for the show. So I write the proposal and give it to my store manager last Friday. From there he gave it to my direct boss, C. He called me and told me to go ahead (with several reservations mind you). C didn't talk to me at all really until last night when she pulled me into the office and completely attacked me. She didn't even leave it to the issue at hand but dredged up every other little and big thing that happened in the last 6 months. I know that I did wrong with the proposal (which she also indirectly called me stupid and accused me of getting my brother to write for me) but she had no right to bring up everything else in the last several months. She flat out attacked me and fully expected me to answer to everything on the spot. Fuck that!