And how do you *know* that "it's no coincidence"?
Life is FULL of coincidences every day, whether one chooses to recognize them or not - a simple example would be the coincidental exact timing of two vehicles with two drivers who know nothing of one another, intersecting at an intersection - if they happen to crash, it perhaps becomes a tragic coincidence that both vehicles just happened to be there at exactly that same second. If they miss one another, it was still the same coincidence that they both happened to be there at exactly that same second, however one of the drivers may have been on the ball with excellent defensive driving skills and was able to avert a crash - maybe shakes the drivers up and life goes on. A crime taking place a day and a half later (or so), does not make Honey's uncharacteristic forgetfulness in responding with her regrets to a committee meeting during likely her busiest social season (nevermind all of the other personal events taking place at that time), become a part of the murder.
Honey was out and about, and seen at the Apotex offices and in fact attended a meeting with both Barry and at least one other person, a day AFTER the missed meeting. So it is not like she missed a meeting and wasn't seen in public ever again and then ended up dead. (If Honey had NOT been seen the following day and THEN ended up murdered, we might have something to theorize about.)
In fact, I know from experience that often in December, organizations will schedule their meetings for early in the month, or omit their December meeting altogether, just because it IS such a busy time for most everyone.... and yet here is Honey, who not only had the usual holiday festivities to organize, but had all of these additional things on the go, and on her mind. Her being murdered a day and a half later does not suddenly make the missed meeting/forgotten regrets take on ominous significance. Sure, it's something for LE to check out, just in case, but it is certainly understandable, imo.