2 Homes

Assuming that  (1) you live in a Non-Community Property State, (2) your  home has only your name / SSN on titile  AND was purchased prior to marriage ,  (3) your home was your main residence till moving to the new  & husband's home, (4) your husband's house -- your main residence to be -- has  only him on title / loan docs,

you do not need to involve your  mortgage companies -- this is only a use change i.e. your house being changed  from your main residence to a second home. Even if you let your parents  live there  it is still not a requirement.   If you rent the property out  ( i.e. use the property as income property)   your home insurance needs to be told ( lower insurance  ) and if you tell the  lender, they may want to  "do-over" the mortgage  (because there is usually a 0.25%  increase  on  income property ).  Most people converting a home  to rental property do change the insurance but do not  inform the  lender ( and as long as  the property is maintained, taxes  & mortgage paid, nobody  cares and no laws are violated ).  That is my take on this