When deciding if paying/helping W is important for the kids sake I think about if I don't do it what will the effect on the kids actually be. Will it be the end of the world if they are late to something? Unless you are going to keep "helping" her forever she will have to learn to handle things on her own. Don't wait for the divorce for her to see how much she really appreciated you because you aren't there to do things for her.
Make sure to check yourself that you aren't using the kids need this as an excuse to save her with the hope that she will appreciate you because most of the time you will be disappointed.
Me-38 W-44 D8 & D6 together '95, Wed '97, Bomb 11/18/08 Still in same house