"He'd been declaiming solidly for about three minutes when he suddenly stopped. Queen Beena is a metahuman. Her ability is to release a specialise pheromone which made most men and some women extremely suggestible. I checked afterwards and she was definitely using it at the time. The Courage of Montu makes Teth Adom highly resistant to that sort of thing, something that I don't think she knew. He shouted -and again I'm sure you've already seen the footage- 'Treacherous witch!'."
"And then he tore her in half."
To be fair to Queen Bee, she could have done it unconsciously. I mean, she doesn't psychically emit telepathic instructions like "You are my slave now, Teth Adom. You want peace! PEACE!!" or say... fire 'emotion beams' that make people happy, sad, or suggestible or something like that.
She just emits pheromones... kind of like what you're probably doing right now and not realizing it.
You know that smell you can't consciously detect because your body has been subconsciously emitting it ever since you went through puberty and humans have a really crummy sense of smell even when they're not trying to describe their own odors? Yeah, that smell is probably pheromones. But you'll never know since... you know... humans have a crummy sense of smell.
Anyway, what I'm getting at is that Queen Bee's power seems to be "everyone who breathes air around her eventually gets mind-controlled if they are a heterosexual man or a homosexual woman". That's basically it. If these pheromones are emitted by her sweat or her skin then she's constantly emitting it to some extent and the best she can consciously control it would be to speed it up or slow it down... and that's assuming it doesn't naturally speed up if she gets hot... in an arid nation in big room full of people while a superpowered guy who can (and will) murder her at any time rants about how much he hates her and how he's certain she's guilty to an international press.
Queen Bee: Oh man, this the worst. *pulls out a handkerchief to mop her brow while looking over her cue cards once more*
Teth Adom: *sniffs the air and turns to her with murder in his eyes* You... Treacherous witch!
Queen Bee: What?
OhshitnoIwasjust! *gets torn in half*
Keep in mind, all we know is that her pheremones make people suggestive. She has to actively command them to do stuff if she has anything in particular for them to do. She does that by talking. Though... I
suppose the pheremones could have the side effect of them just liking her more in which case emitting the pheremones just make people stop being angry at her and start being friendly until she actively commands them to do something for her. In that case there's really no reason for her to not have it active 24/7.
Young Queen Bee: *sleeping in bed* Aw, yes Mrs. Buzzy, I will help you find your dandy lions!
Assassin: *Sneaking up on her with a knife in hand* Yess, once I kill the heir to the throne, Bialya will belong to the people and my Master will take control! *prepares to stab her*
Young Queen Bee's Pheromone Gland:
Oh, no ya don't. *emits pheremones*
Assassin: ... daww... so cute. *drops the knife*
Bodyguard: *steps in through the door* Hey, what's with this... Assassin! *pulls a gun*
Assassin: *with a goofy grin on his face* Huh?
BLAM! *gets shot*
Young Queen Bee: *still asleep* Yay... fireworks. *snore*
I mean, there's really no reason for her to
not be using her pheromones 24/7 and no reason for the off switch to even be in her conscious control. She could have been sitting there hearing Adom rant about her and then her pheromone glands are all "Stress detected. Emitting 'friendliness pheromones' to ensure happiness." completely without her conscious input.
I guess what I'm saying is that Queen Bee probably just automatically uses her pheromones all the time, and expecting otherwise would be kind of naive. She was pretty much dead as soon as she agreed to meet him in person and if anything the fact that it took Adom 3 minutes to flip out means that she had probably taken a shower and gotten fresh clothes just before the meeting started and it took 3 minutes for her metahuman sweat glands to resume their automatic task of "make everyone obey us". If Adom or OL didn't want Queen Bee dead, they should have either had Adom wear nose plugs or put Queen Bee behind a TV screen or use some kind of magical air purification spell or xenotech on the room to ensure the pheremones weren't possible.
Unless of course someone just synthesized Queen Bee's pheremones and sprayed it in the air to frame her.