I'm like you, still trying to figure out how to introduce topics in Family Worship Night, or rather begin having a Family Worship Night and not send up apostate red flags in the process. I like how ILoveTTATT does it. See post below.
He focuses on using just the Bible in Family Worship, and makes some good deductions from just the scriptures.
My wife is somewhat aware of my position, but not to the full degree. When I start our family worship night, I'm going to open it along the lines of "How can we believe in something that we have never read. I've never read the Bible fully. It's entirely too long. But now that the FDS has reduced the Bible by 13%, we don't have any excuse anymore." Then I'm just going to focus on the scriptures. I'm going to set this as a clearly defined goal, have discussion about what we read, and not deviate to the Wt propaganda.