Special request orders are some of my favourite. It gives me the opportunity to sew something a little different. After a while, sewing the same several pairs of panties can get tedious! I always enjoy sewing something new!
I've sewn this style of bra before, but in cottons. It is based off of a pattern that I have from the 1940's for a bandeau swimsuit top. The pattern itself is incredibly simple, and would be easy for anyone to reproduce at home with little drafting skills involved. Adding elastic, and a bra hook at the back updates the piece, and the elastic makes it a little more comfortable than just a hemmed edge.
I think the gathers work nicely on the satin, and gives it a real sense of dimension. I really love this piece and hope to make one for myself, but in black (because I practically am always in black) with straps.