She knows (Patreon)

So apparently when she's not conducting possibly-illegal experiments, Bev spends a lot of time on the internet and fantasizing about her boss...

I'm pretty sure Mo knows what 'futanari' means, but was more interested in why Bev wrote it on the board.  That and the "gherkin jerkin" bit popped into my head yesterday , and I couldn't resist writing the rest around it.  :P