Extending lyrics after notes

[Keith Dunsire]

I am setting the Reproaches for Good Friday and after each verse want to add
some italic text indicating which response follows that verse.

If I try using \markup and line it with the lyrics, the lyrics all move 
downwards.

How can I leave the lyrics where they are, and add some extra italic words to
the end that have no note to attach to? If this means adding an invisible note
of some  sort that takes up no space, please tell me how?

Thank you

Keith