There has been curiosity here about a will, probate, etc for MB. I live in Texas and am very conversant with the legal process of passing assets along, when someone dies. (I know the legalities and have been through the process many times over the years, with both family and non-family.) So here's the bottom line. (This is the practical version per what really happens, not the legal ideal.)
1 "Probate" is the legal process - court - for determining who gets to own/control assets when a person dies or is unable to handle their affairs. (For the discussion here, I'm not going to deal with the latter, although the underlying legal concepts are very similar.)
2 The trigger is assets (a) tied to the name of a deceased, that (b) are unable to be used/disposed of without getting the deceased name out of the mix, and (c) [this is important] a need arises to do so.
3 The most common trigger for death probate in Texas is to sell real estate owned by deceased.
4 Death probate starts when someone starts it. Typically, it happens by either filing a will or filing a "claim" against the estate of a deceased. But if there is no will, or no claim, and no real estate to sell, often no one gets in any hurry. (And a person can die without there being a need for a probate, ever, so death itself isn't a trigger.)
5 When one spouse dies, it is common for the other to stay in the house, and they may not move. As a result, it can be possible for the real estate to stay in the name of both spouses, until a need arises to sell.
6 In theory, death probate (if needed) is supposed to begin fairly soon. Practically, however, it might not. (I've seen probates that weren't done for 30, 40, or more years.)
7 Probate can also be expensive at times, so there is an incentive to put it off if you can.
8 OTOH a death probate may be started fairly quickly, if there's a reason.
9 Once started, it can be fairly quick, or it might drag on for quite some time. On occasion, for many years.
All that having been said, any probate at this time regarding MB (or not) is really irrelevant to the murder, and can tell us nothing in that vein. Yes, outsiders can dig around out of curiosity and see whether a probate has been opened, what's going on with it, find out more about this family, etc. But I hope they don't, and if they do it here I hope WS is family-friendly enough to remove any such stuff and ban them, because a probate would have NOTHING to do with MB's murder, and her family has endured enough without creepy outsiders snooping through their personal lives and airing info on them out of idle curiosity or boredom. JMO