The picture of your painting is beautiful, I can only imagine how much more beautiful it is in person. My mother in law was also a artist and each time she painted one of her family members she would put a message to the subject(s) in the bottom corner, near her signature. She did it in such a way that it did not interfere with the integrity of the picture but she left her personal message of love to each. Now that she is gone I have to tell you it makes her gifts that much more special.
Keep painting!!