Q: We see my husband’s 9-year-old son every other weekend and two weeks in the summer. He has major issues in school with both behavior and doing his work. He’s well behaved when he’s with us, but his mother lets him get away with a lot. Also, she thinks teachers should punish for school problems and she should punish for home problems (but she doesn’t). We have planned a trip to Disney World and have told Charlie that if he doesn’t do his schoolwork between now and then, we will not give him spending money for the trip. He did his work for a week, then stopped. Now we’re second-guessing our d…