START: CHARLES (without looking up). Look at this – another motion against my brother. Really! He may be a Catholic – and a liability – but he is the rightful heir. But will they hear it? Ugh! How was the play?
NELL. –
CHARLES. Good audience?
NELL. We didn’t go on.
[... …]
END: CHARLES. I love you!
NELL. Shush.
CHARLES. I / love you!
NELL. They’ll all hear!
CHARLES. And so they should. I LOVE HER! I LOVE HER! I LOVE NELL GWYNN! I LOVE NELL GWYNN!!
NELL. I LOVE CHARLES STUART!
Pause
CHARLES. NELL GWYNN LOVES ME! NELL GWYNN LOVES ME!

For full extended scene, please refer to the script edition cited here:
Jessica Swale, Nell Gwynn, NHB Modern Plays, electronic edition, pp. 108-111