Step kids

I’m always the one being the parent when my bfs kids r down (im25 and he’s 51) he doesn’t do really anything with his kids (12 n 10), I’m always the one having to tell them to shower, change their clothes, clean their hamsters bedding, i had my/our first baby 6 months ago and he legit does nothing to help me out other then work, all he does is play on his computer and his phone, is it wrong of me to not tell the kids to shower /change their clothes ?, do they really need two moms?🤷🏽‍♀️