I took several product pictures for a client that they made with a brand. The images were used for social media. No contract on my end with my client. That client worked for an agency but she owned all her clients. They separated ways and now the agency is saying they own all pictures I took and edited. I recently reposted the same pictures on my clients social and the agency sent my client a seize and assist type email. To remove any duplicated images because they owned the rights. To my knowledge I own the pictures as the photographer and I can share them as I please. Am I wrong?