Now maybe you are thinking, 'moderation' but why then not use half of the sauce?
It slices through with a breadknife, put half back in the freezer for another day. Did you already think of using half?
Well done you!
(In photo with half of the sauce :4 servings).
With this suggestion i wouldn't have personally added capers if a meat-eater and if you wanted to add chicken, i didn't have any capers but thought it would be complemented by. But why not keep the chicken for another day and or indeed another meal whilst you are sorting yourself out. Tasty though!
Remember: A better way to do it would be to defrost and reheat the sauce and then to add the sauce to the hot cooked pasta.