if they've been separated then she should start eating soon. i suggest that about 20 minutes before you want to feed them you physically put her on the basking spot, which should be within 30cm of the heat lamp. hopefully she'll just laze around and bask for 15 or 20 minutes and get nice and warmed up, then offer her crickets or woodies, but try only 1 or 2 at a time (as they can get overwhelmed by too many at once if theyre feeling a bit sensitive). maybe even leave the room while the crickets are in there (obvs if youre confident she or the crix cant get out) - if she wouldnt eat in front of the boy, she may be a bit shy about eating with a worried dad leaning over her! (i found that out when one of mine sulked for a while - she ate the second i left the room). if she doesnt eat them after 10 or so minutes, take them out, try the whole thing the next day. she'll eventually eat.
wow that was a long post but i hope it gives you a bit of help!