The thing is- I can't stand liars, that take advantage of the trust and love that we have given to them- free of charge! and throws it out like it means nothing and watches as we continue to smile, though forced now, and through gritted teeth we tell you how much we love and appreciate you.
So please, just tell the truth. Even if you just "don't want us to worry," because really, the thoughts that swirl our mind are worse than any truth that you could bring.