Not excusing her actions, but, I'm sure she felt it was for the best. And If I'm reading it correctly (I skimmed through the article rather quickly) it says the father's own mother helped Tiffany run away? if so, that says a lot.
She probably took her kids with her to get out of a bad situation, maybe abuse.
this
and if any of yall keep up with Tiffany on twitter on instagram, all she ever posts about is those kids. she seems like such a kind and caring person, i would be completely SHOCKED if she didnt do this for a good reason