Well Bro, how bad do you wanna grow I guess.
If you can be as happy with your current size as she is then just stay natural. OR, you could do it without her knowing. WHen I put on a few pounds from my cutter in the spring, I'm just gonna tell my girl that I only look bigger because I'm more defined.
Guess it all depends on how cool you or her one is with compromise. Still though Bro, I say do what makes you happy, she should be able to respect that, knowing you would do the same for her.