[Nelson]

1) Find a suitable replacement for her job ahead of time that meets your expectations

2) Tell her the partnership is over is she doesn't start pulling her weight (generating leads, doing some of the closing work, meeting with clients, etc.)

3) If she gets angry, destroy your partnership and replace her with an employee rather than a partner.

It's not worth it to try and argue that shes selfish. Everyone is selfish and all she will do is take offense. Instead use your partnership as leverage. Lay down the facts and tell her to get her act together. If she deosn't comply then you need to throw her out on her ass.