Background Info: The father (my bf) works 48 hour shifts and the mother lives in Florida. We're not married (yet) so I'm the responsible adult when the father is working. The father is 40, the son is 16, and I'm 28.

I'm really trying to make things work but it's getting harder and harder. I feel like I'm being taken advantage of and things are being done on purpose just to get at me. The son is 16 and his mother gave him a car for his 15th birthday. I don't live with my bf but I take care of the house and pets while he's working and try to keep tabs on his son. The son has a new girlfriend (also 16) and he's been staying late at her house. The father was working last Friday and the son was supposed to be home by midnight because he's 16 and there's a driving curfew. I told his father that I would stay at the house and wait for his son to come home so he could get some sleep because they had a busy night the night before. He told his son to be home at midnight and that I was there waiting on him. I texted the son at 12:30 and asked when he was coming home and he said he didn't know. I texted him back and told him that his father had told me midnight and replied back that his father didn't give him a time to be home. He told me he wouldn't be too much longer. I waited another hour and text him again (now 1:30am). He said he would be leaving in 15 minutes. Another hour went by and he finally came home at 2:30am. He came in and went to bed, no hi or sorry or anything. When his father asked me what time he had gotten home and I told him 2:30 he was furious. The son said he didn't think it was a big deal and that I was annoying him when he was trying to spend time with his girlfriend.

Then, last night, the son came home angry as usual and throwing/slamming things around. His father asked him what was wrong and he was mad because he couldn't park the way he wanted to because the neighbor was blocking the driveway. He also said he was mad at me because he never gets any alone time at the house when his dad is gone but then complains that he doesn't want to be all alone in the house. When I come over to do things around the house and take out the trash and let the dogs out (which the son doesn't do anything around the house, not even feed and water the dogs), he complains that I'm there and smothering him. So, when I stay away to give him his space, he's gone the entire time and doesn't come home until late.

I feel like I just can't win. His mother lives in Florida and she gives him everything he asks for and lets him do whatever he wants. He has tons of bills (private school tuition, football, car payments, orthodontist payments, gas money, food money ...), doesn't have a job, doesn't have any responsibilities and his mother isn't helping to financially support him. She buys him a new paid of custom Nikes every 3 months but claims she doesn't have the money to pay half his tuition or help with any of his other payments. I work full time and go to school full time and I make $240 a week. The kid has no problem asking me for money when I don't really have any and he's going through $80 a week in food, $50 a week in gas, and then he wants more money to take his girlfriend out on the weekends. I feel like telling him to get a job. At his age, I had to share a car with my brother and mom, I had 2 part time jobs and school.

I feel like he takes full advantage of me when his father isn't around and he makes everything hard on me on purpose. The father and I have been together for over 5 years and we don't really have a normal relationship. We try to do things as a couple but no matter when we plan something, the son always has something to do or really wants to spend time with his dad without me around because they don't get to talk or get their guy time. I've offered to give them their space and when the father plans something with the son to spend time with him, the son just blows it off and makes other plans but doesn't tell his dad until it's after the fact.

The son has a smart mouth, no manners, is rude, selfish, lazy, and thinks he should get whatever he wants. He'll ask his dad for something (usually something that's expensive) and his dad will say not now because he can't afford it with everything that he's paying for and the son tells him that he'll just call his mom and her and her boyfriend will buy it for him because he's a better dad anyways (mom's bf). I know it hurts his dad's feelings because his dad has given him all the important things in life that he needs, not everything he wants. I get so mad when the son takes advantage of the father and walks all over him and degrades him just because he won't buy him a new xbox for $400 when the son already has 2 but they aren't special edition.

I'm just completely lost on my boundaries of discipline and it's not like the son would listen to me anyways. I was raised differently and my parents would've beat me silly if I was acting this way at 16. Anyone with any advice, I would greatly appreciate it.