While there are some differences noted here, in many ways you should treat them the same way you would girls of other faiths. I agree, girls, it can be a challenge to find time together. Having seen many examples of the disaster it becomes when a member spouse pushes, coerces, ultimatums the non-member spouse into being baptized, I have very assiduously steered clear of those methods from the start.
Note, her mind and TSCC were married first. As our relationship has progressed, this vague hypothetical question has led to some much more concrete thinking about what an interfaith marriage would be like for me, for him, and for us. Her experience may or may not be typical, but it is something to consider.
Your spouse can be involved with anything that does not require a scheduled time. We'll discuss further after the holiday and see where we end up. A couple of things I run into most is that people assume I am also Mormon. I'm married an interventional cardiologist; and I wish I only knew 5 years ago before she started her fellowship what the heck I was signing up for.
My husband has gone from proselytizing and thinking he knows it all to a real spiritual seeker, albeit with a strong testimony in the church. You can't provide that for her so your marriage will be defective from the outset. Learn all you can.