Pocket  best Birthday Of big son in law Images. Happy birthday to the mother-in-law who has been more of a mother to me, and less of an in-law.I always wanted an amazing husband who would understand me and a wonderful mother-in-law who would get along with me. I am thankful because God granted both my wishes. Happy birthday. I am glad that I never understood the real meaning of mother-in-law because I always had a mother, friend, companion and agony aunt all rolled into one in my mother-in-law. Happy birthday.