Yes sounds like a difficult situation. If your pioneer sister is very zealous she might listen to a problem you have with a fictitious work colleague.
In the bible teach book in the appendix 70 weeks of years is discussed. The start date of Artexeres rule is not actually confirmed by historians as the bible teach book states. You could say you have been approached and can she help you solve this problem.
I found this when studying with my son, and had egg on my face when historians gave a different date to WT.
There are plenty more ideas you could use to test the water
Take care Kate xx