Bed bugs

I'm pissed beyond pissed . My daughter just came home from her mamaws & as I'm getting her pacy out of her diaper bag I see bug crawling on her bag .. I think it's an ant at first but I look closer IT'S A BED BUG!! So I search my diaper bag &find 4 more in the corner .. an hour or so later she calls & ask can she keep the kids over night &I tell her no because I found bed bugs on my babys diaper bag. She said it's not that big of a deal it's just bugs... I have NEVER in my life dealt with them before &I dont wanna deal with them now ! Am I wrong for telling her she cant have my kids over night because of the bugs. Should I have approached it differently