Where is my Widow Dagger?

[Jerry Price]

I spent months getting ready for the Brood Mother. I beat her on my first try! When I analyzed my bounty, it would not analyze the spider venom(even though I got it) now it won't let me make the widow dagger, it's not even listed. Just gives me the option to build the club? Need the dagger to collect pond moss to finish Sarah's trinket. Do I need to kill her more then once to get the dagger option?

[iMiAMi2014]

Widow Dagger becomes available after analyzing Super Spider Venom dropped by Black Widow (not Brood Mother)

[Jerry Price]

Ok Thank you, didn't know that