Just a joke!
Let's think normally, there IS a more than good chance the cliffhanger is as far as it gets, thus making it bait. The only reasons I can think of that Shinobu wouldn't stop it are: 1) extended shock (very low) and/or 2) his chat with Ryusei convincing him that letting Fumi do what she's doing right now is the best way to make her "shine" which doesn't make much more sense.
Even if they're not dating, off scripting like this is bad regardless. However, keep in mind, stopping it alone is the easiest step, resolving Fumi's insecurities and jealousy at this point are a different question and I don't think anyone knows what Air-senseii's intentions really are right now.