For me it was this May and June. In May my 24 year old son who has just returned from military service and Iraq took me out to dinner for my birthday and he paid. In June my two daughters, 26 & 27, took my husband and I out to lunch for Fathers Day and they paid. In the past we always paid even though it was our birthday/holiday. Their only contribution was showing up. I told them all - "that's it....you're officially adults". It was the first time they ever paid to treat me/us. We still pick up the tab when we all go out to eat, which is often, and expensive. Felt really good to have the "kids" start paying our way. But then again, they haven't offered to pick up the tab since and we've all gone out to eat many times.