Wants nude pictures

So my fiancé for 3 years has just text me asking what I was going, I sent him a picture in my towel telling him id just got out the bath. He then text me saying send me a pic without the towel, so I sent him a picture without my towel covering my breasts. He then says move your hand away... 
I just paused and didn't know what do to. I wanted to but then got abit scared, he loves my boobs I just didn't know how I felt by sending him a picture. 
He said he wants to see my sexy side to show him my body ect.. 
What do you ladies think about this .. Help!!! I want to show him my sexy side but how do I do it in a special way?