Regarding the 'won't take no for an answer' - it's still your choice what you eat. You're just going to have to be more obstinate than they are. You don't need to make it into the Alamo, just be firm then let the matter drop and have an enjoyable evening.
If you feel the need to make an explanation, tell them you're making some positive changes for your health. You come because you want to spend time with them but you'll pass on dinner.
You can always take something over you can eat yourself. They are family, if they don't provide anything you'll want to eat take the bull by the horns and provide for yourself.
Hopefully this will help you stay on track on those occasions.
(Round Three) ChaLEAN Extreme 90 day challenge met on 5/03/13.
(Round Two) ChaLEAN Extreme 90 day challenge met on 10/19/2012
(Round One) ChaLEAN Extreme 90 day challenge met on 5/21/2012.
Virtual 5K Walk/Run 10/28/12 - 41:10
Virtual 5K Walk/Run 7/29/12 - 44:03
A healthy mind makes a healthy body possible.