Get your wife's sewing machine out and get her to show you how to zig-zag stitch. Buy her a big box of chocolates and some flowers and ask her to help you sew up the seam. Normal strong cotton will do for a temporary repair but your chandlers might have some sail cotton.

I can send some double sided sail makers tape up. If you clean the surfaces, that will hold it for ever. It's the stuff that holds your spinny together. Give me a call 07711 269622.