Do you feel like the wicked step-mother?
Blended families are becoming more the "norm" and your role as step-mother is difficult and rewarding. Your relationship with your partners child(ren) needs ground rules. Discuss how and by whom the children will be diciplined, bedtimes, homework help, snack time etc. Showing a united front will allow for easier transition between visitations or permanent living situations. If you're feeling resentment or closed off from the child talk to your partner about your feelings. Open communication is key to a happy relationship. Bonding takes time... take advantage of family outings, family game night or movie night. Give children one on one time with both of you, even if its only for ten minutes.