Card Flower

What kind of message should I write on the card of flowers to (almost 2 years) the mother of my boyfriend and his G-ma?
His grandmother is temporarily living with them and I think it would be fair to send flowers and a card, too. I do not know what to write in his letters … please help!
The Grandma – Thank you for bringing (name of mother) in this world than I have (name of groom) I love him and his family. The mother – Thank you for bringing (name of groom) in this world, of which I have love and happiness. I love him and his family.
