missing my step-sons

after the wonderful weekend we had - filled with tons of family time....i'm really missing my step-sons! it's been over a month since we've heard from them & it's getting harder & harder to 'hold out' for a phone call.....after my post about 'the ex' possibly moving down here, we found out that as we guessed, she wasn't/didn't move down here at all (and probably never actually planned to).....that they are living & going to school in MD - but we don't know where in MD exactly.....she disconnected her cell phone or had her number changed.....we've been mailing the child support checks to her mother, who i assume is getting them to her.....but we literally have not heard a word from them! :0( i hate that not only are they missing out on all the fun that our family has here, but that we're missing out on them! i want to know what's going on with them, what they're up to, what sports they're playing, how they're doing in school, if they're dating, etc., etc.....and i want them to b a part of our life here! i HATE this situation & really wish i had the answer.....i wish i knew what to tell jaden, gabrielle & corinn when they ask us when curtis & corey are coming to see us again! i teared up last time they asked me & i'm starting to wonder how long i should avoid the conversation that i know i'll eventually have to have with them.....i've turned this situation over to God & pray that a resolution will be evident soon - all we can do is pray & wait, i guess