Question about Mamba venom?

Well the first thing that i see wrong with this is venom must be injected to kill someone. poison on the other hand can be drunk and you would die. if she had a way for the venom to get into her blood system through either a cut or an ulcer or maybe she did bite down to hard on her lip. in that case the venom would kill her in half an hour to an hour. with the exception of hitting an artery where venom is injected really does not effect the time it takes to kill you. but if you do get bitten somewhere on your face or near your heart this will make the venom distribute through your body a lot faster.