now what do i do?

i recently asked a ? about my boyfriends mom watching my baby while i was in the hospital having my second baby. but now things have changed! we were @ my bfs families house on christmas day & a fight broke out between my bfs moms bf & his half brother & my bfs moms bf went to his house & got a gun but was stopped by someone b4 he got back over there with it! & the one that went and got the gun was not under any influence of anything just so u know. am i wrong 4 making the decision that she will not watch my baby bc i know she will have to be around her bf in the couple days we r gone even though i know she will not hurt her or let her get hurt i still dont feel comfortable with it. what if her bfs half brother goes over there while we r at the hospital and that incident happens again but he is not stopped & it is worse this time & things do happen? i love my daughter & i dont want to put her life in danger & if i let my bfs mom keep her i feel like thats what i will be letting happen.