So my husband

So my husband brought his brother to stay with us like more than a year ago he told me he only staying for 3months well it's OK it dosent bother me he been here more than a year but now he brought his gf to stay with him my apartment is small so they have the room I'm in the leaving room I have 3kids I knoe I need my space but it's OK all I ask my husband for was OK tell him to go halfers on the rent with me if his girl staying here so we ended up fighting he said no bec his brother don't have money I'm like OK so u preferr me n the kids stay with out money to have him happy she showers here n honestly it makes me feel nasty. Should I leave with my kids n don't pay the rent I'm just tired of staying broke n not having money for my kids it looks like he prefers to keep his brother😭