Unlikely. Alice saw Bella, so unless someone is doing a remarkably good job of spoofing her (which is something that has not yet been mentioned as possible) Bella is alive. The only way I can think of, barring some entirely new witch, to spoof Alice that makes any sense is that Adelaide copying Alice can spoof her, in the same way that she can Jasper, and we know that Adelaide was last seen with an entirely useless power (Elspeth's) and has not touched Alice since.