_MK_ said:Your undertaking of all costs of 20 years for your wife still stands. Just because you separated doesnt mean you are no longer liable.
So you 3 people to support on your parents application.
I suggest you talk to a lawyer. No one here is an expert on special cases such as yours. Almost everyone is a cookie cutter regular applicant.
Undertaking for a spouse is 3 years, not 20.