I'm also programmed for guilt if I can't help them both. Yesterday was a good example. I always pick up my son's children every afternoon and take them home. But yesterday my DD called in a fluster to ask " could I go and pick hers up, take DG to horse riding lessons and stay until she got home ". Both she and her husband had work responsibilities that they couldn't get out of. I couldn't bear to say no, so I tied myself into knots to achieve my aims. Picked up my son's children early from school and then drove us all for an hour to pick up DD's two, took DG2 to horse riding, back to DD's place and fed everybody, and when she finally got home at 8pm I bundled DS's children into the car and drove an hour back to deliver them home to Dad. My husband says I am mad, but I'm hard wired to bend over backwards for them . I don't have any great interests or hobbies , I just have my family and I wouldn't be without them. Like you I feel bad if I can't help . I think that mothers and grandmothers are sisters under the skin when it comes to guilt !