Trial judge upheld validity of codicil holding that burden of proving due execution of codicil was satisfied.

In action for annulment on ground of non-consummation, defendant could be deemed incompetent when refusing to submit to medical treatment or examination if non-consummation was established to court's satisfaction

Fresh evidence disclosed that children continued to be very high needs for special services, monitoring and other forms of intervention; due diligence requirement for admission of fresh evidence was diminished here because evidence focused on ongoing nature of children's needs and behavioural challenges, as well as parents' ability to meet those needs