Time to toughen her up and not play into her games too. Kids will go as far as you let them. Now, if she is really having issues, fine, but if she is crying about a runny nose, time to adopt the "suck it up buttercup" attitude with her or she is going to continue this. We always used the 'TV test' if we weren't sure how sick the kids were--'ok, you can stay home but in bed, in pj's, no tv, no games, etc." If they were ok with that, they were sick enough to stay home. There were plenty of times you would say this and would get the "well, maybe I am not THAT sick". When they were obviously sick, high fever, etc. it wasn't an issue.