Help! Idk how I can help my step son!! 😵😵

Snow • Shorty, Jay, MT, Serenity ❤❤❤

First of all, I have been in his life for 5 ish years. He's almost 8. I believe he may be adhd but he hasn't been tested as his bio mom refuses and my husband, his dad, is partially in denial but he has adhd and isn't medicated because as a child he HATED how it made him feel so he refuses to do that to his son...

Anyways, I am a sahm and so while my husband works 6-7 days a week 10+ hrs a day I'm here with my daughter (8), my step son (7), and my almost 2 yr old son...everyday I have almost no issues w my daughter and listening/behaving. Of course she has her moments where she's a diva, but she understands respect and boundaries well. With my step son, I hAve to CONSTANTLY repeat myself everyday w the same rules. Everyday I have to say the same stuff to him as if I didn't just say it 5 minutes ago, I mean it is so constant I feel like I'm loosing it. It's not like these are new rules and even if they are i have more trouble w my step son listening/behaving then my 2yr old. It's really frustrating. He is also very bad w sharing, understanding others boundaries, he doesn't get his way he pouts, he can be rude and disrespectful towards me and the other kids...

Now my real question is, Is this due to adhd or other behavioral issues ?! What can I do to help him and everyone else?!

I am at my wits end w the situation and need help I can't talk to my husband much because he feels like I'm targeting him or something. But my step son acts kinda different around his father considering he is the.main disciplinarian in our house. So my husband has no idea what I deal w everyday, it's draining me!!! Help!!!