Not 100% accurate, when she "snapped" she no longer respected Asuna AT ALL XD She was having Yandere moments left and right ever since she first used Kirito's dick when he was unconscious, muttering things about how she wasn't "doing her duty as his girlfriend" and growling about rivals, is just that she mostly did it in one-off scenes that are easy to forget so unless you're paying full attention to Suguha (Like me XP), it's easy to miss. Sugu didn't give a shit about Asuna as Kirito's gf anymore for ages, seeing her cheating with Inoda just motivated her to take things to the next level, but she hasn't even felt guilty from riding Kirito's dick while he's unconscious in forever. Hell, it was implied she may specifically have drained him the night before their last date knowing it would tank his sexual performance with Asuna