The amount I am paying is just what I decided on out of fear of the wrath of STBX. I would not pay for D18, but her living with me is an expense I never budgeted for. I got the green light from my attorney yesterday telling me since there is no court order, I can unilaterally reduce the amount of money I give her. She's able to buy the kids tons of Christmas presents, and I scrape by. D18 is on a pull out sofa bed, and S10 sleeps with me. NOT RIGHT!