Well, of course it does. People are always going to think the husband did it, because it's so much less complicated that way.
I would respectfully ask you, though, how do you know what she would or would not have done? People do strange things all the time without it making much sense to the rest of us. Unless you knew her personally, of course, and even then, people can be unpredictable. I don't believe it's ever been confirmed that she went to get medicine, it was only discussed as a possibility. Maybe she went to meet someone she knew, or was headed back to the party. Could have been a guy she had barely met, and things went horribly wrong and he killed her and then set the rest of it up. The point is, there can be just as many arguments against the hubby as there are for him being the one. We just don't know.
For her childrens' sakes, I hope to God it wasn't their daddy, they have all had
enough to deal with without that added on. My heart goes out to them.