This is so timely for me. When DD was young and we could no longer spell things in front of her as a code, DH and I started spelling more obscure words. One day DH and I were talking about how to handle the stranger safety topic when DD walked in (I think she was about 4). DH spelled predator to me. DD said very seriously "yeah, I don't want to be someone's prey". That's the first time I realized that pretty soon DH and DD would be the ones talking and I would have no clue what they were saying.
And when we found out her LOG last spring, several of our friends, even DH himself, assumed it came from him. However, those who work with me or went to college with me all say it comes from both of us. In fact, my mother reminded me that my grade school differentiated for me and did subject acceleration with me.
It's been quite an awakening for me. DH and I realize now that we are both HG+, just in different ways. I'm better at math for example, even though he remembers the formulas and I don't. I have more natural ability there, as does DD.
My reason for sharing so much (I hope not TMI) is that you could be like me. I realize after reading so much about HG+ this past year that I was a perfectionistic underachiever in school and chose social stuff over academia. In other words, I hide my giftedness well, but pull it out when it suits me :-)
Don't just assume it all comes from your husband. My self-confidence has greatly improved!