Is It Possible to Read That Ending as if Bobby Has Killed His Mother With the Long Knife?

It's possible to read that ending as though bobby has killed his mother with the long knife. I think there is totally a reading in which this is like a story of a murder, and theyre like, many different versions of that murder that you could imagine. And then it's also somehow equally scarious story if that's not what's happened, if, like, nothing's happened. i almost wish it wasn't a knife, you know, likilig. There could be a quieter object at a centr or whatever.