That's the thing, while I think this small tidbit might have big implications in the future for Sugu, it wasn’t something that happened in a scene with Suguha.
During the early parts of the last update, when Asuna and Kirito are going out on a date to the cinema there were a lot of stuff that happened that might be foreshadowing for the future.
Amongst those the meeting with Hebishima was interesting, not because anything that happened between those three, but the discussion between Kirito and Asuna afterwards.
Kirito started going on and on about how much of a scumbag Hebishima is, and how he was a bad influence on Suguha due to her changes in speech pattern and way of dressing up.
The joke of the conversation was how Kirito was sure that Sugu wouldn't allow anything to happen, when every player already knows that Suguha was a victim of his and his generic tanned ntr-dick.
What's interesting for Suguha's future is what happened when Asuna hinted at the possibility of Sugu liking Hebishima.
Kirito blew his casket and started going on and on about how he as a big brother wouldn't allow that to happen.
A normal statement right? After all, no one would like their friend or family to be involved with a scumbag like Hebishima. But, what's truly interesting is Asuna's reaction to that comment from Kirito.
She was silent, but perturbed by that comment. Like Kirito was being weird, or too possessive of his sister in an abnormal way.
Throughout the update Asuna had made similar pauses and reactions whenever something hinted at Kirito cheating, but this was different. It was solely focused on the idea of Kirito being too attached to Suguha.
I believe this is a hint of a possible path that Fujino decided to laid out now, either with Suguha ending up getting NTR'ed once again to trample over Kirito's feelings of protectiveness, or the much better outcome for me, the possibility that Kirito has a subconscious attraction and possessive tendencies towards Suguha after spending so much time together in part 2.
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Am I losing my mind after inhaling unhealthy amounts of Sugu's copium ? Probably, but just like I believed in Satoru Gojo's comeback until the last chapter of JJK, I will believe in a happy ending for Suguha until the day Fujino finishes this game.