I had no idea it was illegal

I had just started seeing this guy from another school. He was really nice and we got along super well. One day for fun he asked me to send him a naked picture of myself. At first I was like, no way! But as we kept talking it didn’t seem like too big a deal, it was only to him. Things being so new I didn’t want it to end either. So I did.  What I didn’t realise was he forwarded that picture to one of his friends and eventually it got around to his whole year group.