It must hurt a bit for Shel too - she can do everything you can with Jazz except this one thing, and Jazz is doing her best to rub it in!
Make sure that you give Jazz a big cuddle, then give Shel a big cuddle and then think about feeding when you get home. We got to the stage where I would get home from work and a little voice would pipe up "Hello booboos" and get very surly about me even putting my bag away before feeding him....