Probably for single parent benefitsI wonder why she didn't sort out their wierd living arrangements before having a baby? Either desperate to trap him/was using him as a donor and provider or she's lying and they do infact live together but doesn't want DWP to catch on. We're a family of 4 living in a tiny 2 bed house but we manage. I would never not let my kids dad live with me because the house was too small if you want to be together you'd make it work!