Roommate rant!!!!!!

So a few months ago I split from my husband and moved in with a female co-worker. We both pretty much needed each others help. I’ve been living with her since this past June. Things were great at first I even offered her to pay half the rent. She declined and asked me to give her $300 a month plus pay the utilities. So as months go by things got a little rocky with us this past few weeks maybe month. I do my part in cleaning up after myself. Cleaning up after her 3 kids. No questions or complains at all. I recently started dating this guy I met. And we had been spending alpt of time together. I’m ALWAYS at his 24/7. I come home to get clothes and to make sure things are okay at home. Lately she’s been giving me this unnecessary attitude. We had a conversation at first like 2 weeks ago and she was upset and frustrated bc I’m not there. Then she tried to say I never clean up anymore and this and that. My thing is I’m not ever home. I’m still giving you rent and paying my parts. I don’t think it’s my job or my issue that her kids didn’t keep the house clean. They constantly go in my things and take my items. I can’t count how many times her 3 year has dumped out a fresh new bottle of my soaps all at once. Not once did she offer to replace or give me the money to buy again. I never made it a big deal. But it is frustrating. Am I in the wrong?