Tammy Hargrave

Tammy Hargrave is the alcoholic mother of James Hargrave and can be found in the common bedroom area on the midship deck of Rivet City, The Muddy Rudder, or occasionally, the Marketplace.

Mesmetron enslavement
She can be enslaved. The easiest way to do this is to stealthily assassinate Brock, then wait 72 hours and go into the muddy rudder. No one asks questions there, except the late bouncer Brock. If Tammy isn't in the bar, she soon will be. Simply Mezz, collar, and walk away whistling. Another option is to wait outside the main doors of Rivet City. She'll come outside for a smoke and then you can easily Mezz her and collar her. As long as no one is outside to witness you putting the collar on her, no one in Rivet City will become hostile to you.

The enslavement of Tammy has very little effect on the game. The option to ask why James is such a brat changes to the NPC telling you that the loss of his mom pushed him over the edge. Tammy is "the bitch" in Rivet city and has absolutely no impact on the game in general.