IB lets you do everything you need. I trade my Mom's, Dad's, and Aunts. Mom and Dad are no problem. My Aunt drives me nutz. I have all allocated in 1/4's so each trade is the same. Mom and Dad are both IRA's so no tax problem, but the Aunt is a regular account, as is mine. I just point her to the website and hand hold her through the print process for taxes. Every other day she calls about some hot popular stock that is all hype and why aren't we in it.
I have my own separate account for my futures trading, I don't want to tell her about futures.
I have my own separate account for my futures trading, I don't want to tell her about futures.