If you want to tell her you've been doing video streaming for twitch, that's fair, but i'd bet she'll ask to see it, and will be curious when you don't want to share.
Estimated taxes are due quarterly on april 15th, june 15th, september 15th and january 15th.
The 1065 includes a K-1 statement that lists each partner's share of the income and expenses to enter on each partner's personal tax return.