Am I being taken advantage of? Am I too nice?

I owe a family member a lot of money like 2grand that was loaned to me to catch up on some bills because I was out of work from having a baby. So heres the thing. This person has been staying at my house for free since July due to some issues. Its now October. Eating my food, using my electricity all day while im not home and would be saving money, using my water, eating our snacks and drinks. Doesnt clean or cook or ofer help. Yells at my kids gor playing in their own house. Argues if I ask for help but then complains about about the money. Now.my kids are refusing to do anything they are asked and have an attitude. Whenever I mention this person leaving I get attitude or they try to make me feel guilty about it. Its like they think they can treat me like shit because I owe them money. I dont know what to do. This is causing me so much stress. And straining my relationship with my kids because they are not listening and im having to yell and my husband because we are fighting over what to do. I need advice because I am stuck. There is no way I can pay the money back at the moment as I am starting my new job. But... Am I in the wrong for wanting them to go? Am I the problem? Because I am stressed and tired. I feel bad. I hate feeling like im being mean like I should suck it up because I owe them money but I dont know what to do. Commentssuggestits my fault for not talking to them about the money before they moved in but they didnt *move in* spent the night and just never left.