Take the middle ground?
You could, if asked directly by a busybody, tell them that T-Rex is your boyfriend, but refrain from being overtly physical.
You're in a public place, so the amount of loud drama would be limited.
And if you're not asked, well, the family will have already met him and he has a chance to make a good impression on them before they do find out.
If I were a busybody, I think I would wonder who exactly this "single", adult male was. If he's good with kids, be very careful that the family doesn't get even worse ideas into their heads. (I'd say I'm paranoid, but that did happen to RedPepper and Mono, and actually precipitated their coming out.)
Last edited by TruckerPete; 03-17-2011 at 11:07 AM.