Hi Scrant, I'm glad you'll be getting away for a couple of weeks. A change of scene and company are always good things.
Just reading your post above - I do think your W treats you much like a brother and her S rather like an auntie. Hmm.
If you weren't behaving back in a brotherly like way (ie: responding) what would you be doing? Do you think you feel 'obliged' to respond when perhaps a response isn't always needed? If I were taking a hard line, I would say that if your S doesn't respond to her, why would you pick up the slack and respond for him? After all, his non-response is a consequence of her abandonment of your family.
Just food for thought anyway.....do relax and have some fun on your break xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus