(decedent conveyed family farm to trust in 2008 with instructions that proceeds from sale of farm after her death be divided equally among three sons; in 2009, decedent changed her will to exclude one son; two sons probated 2009 will; trustee appeared in probate and stated farm had been conveyed to trust in 2008; trial held and court concluded farm was corpus of trust and should be divided equally; court’s opinion affirmed as reasonable interpretation of trust document).