You could get her to 'evangelize' with talks and maybe some cold calling/email, if she's up to it. You'll know she'll be passionate about it, since it's her ide

You could get her to 'evangelize' with talks and maybe some cold calling/email, if she's up to it. You'll know she'll be passionate about it, since it's her idea and she can explain many bits of it in an intuitive way. On the other hand, she'll be the de-facto marketing person, which should make it easier for you to think of an equity split. She'll then get to contribute actively to the business and you'll both be happier down the road.