Carolyn Hax: Single-mom sister teaches her kids a cynical view of love. Is she wrong?

Furthermore, it would be a good idea to give some thought to why, when you developed these misgivings, two-thirds of your first impulses involved acting upon them through meddling in your sister’s family — and three-thirds involved acting upon your misgivings, period. Sometimes we accomplish more by — again — thinking more, observing more, and doing or saying less. Or nothing. At least until it becomes obvious that interceding is the only responsible course of action.

Source: WP