It is difficult to find a balance, but it can be done! Honestly if you have been with your spouse long enough you should know how she feels. If it has been established from the get go that your passion and goal in life is to be a film maker then your spouse should already know what road is ahead. You have to trust your gut and at times your going to have to make decisions that might interfere with your relationship but you also have to know when to say no to a gig. Trust me it is difficult, at least for me because my Fiance and I do almost 80% of everything together. Luckily for me she has shown an interest in my work, and is even willing to learn a few things to help me out. As great as that is i'm sure there are going to be many conflicts anyway it's just part of life. Best thing you can do is maintain that communication with your significant other as much as you can so there are no surprises down the road. One thing my Fiance hates is when I do last minute stuff, (especially when its not paid), and in this business at the indie level we need to jump on an opportunity while its there. Ultimately go with your instincts and choose wisely when it comes to projects and keep them in the loop as much as you can.