WILBRAHAM, MA—Saying she would be thrilled to babysit for a couple days, area grandmother Margie Callahan has offered to watch her two grandchildren while their parents spend a weekend desperately trying to revive their marriage, sources reported Monday. “It’ll be great to have little Ethan and Emma come stay over with Pop-Pop and I,” said Callahan, who explained that she could bake cookies with the children, take them to the zoo, and watch Bob The Builder with them during the 48-hour window in which her daughter and son-in-law will visit a nearby resort and spa in an attempt to salvage any romantic feelings that may still exist between them.