I think you are doing exactly what your suppossed to be doing. She is taking advantage of your time away for work and doing her own thing. Which would be ok except a woman in a relationship should not be in a bar partying. As far as her kids, I don't blame you for not wanting them around your young son. If they buy drugs for their younger siblings, they would'nt think twice about getting them for your son. I say get out of this relationship and move on.