Just wondering. - with the exception of specific requests TS may have left in the will attachment, and everything going to Mark, what IF he is involved in her murder?
Does he still inherit everything? Or can her family contest the will? Perhaps, the person named as guardian of the children may contest it since they are named in the will?
***SPECULATION ONLY***
PS: This is difficult to say. Many times wills are made early in a marriage or when the first child arrives. The couple is head over hills in love and could never imagine less than a perfect marriage. Time moves on, people change as do relationships for various reasons.
After a period, the marriage changes, it's not so perfect now, however, couples don't think about their will and would they still want the same things.
We don't know the type of marriage the Sievers had. From the bits and pieces we have learned, we can take a guess. Therein lies my concern over TS's will as it was made some years ago. Is it what she would want today? I sincerely hope so.