Advice please !!!

Anyone on here a step parent?

I need some advice.

I'm trying everything in my power to make this relationship work with my three year old step daughter but it's hard when her mom is in her ear all the time.

She's three so of course she tells everything. She tells me that she hates me because her mom does, that she don't want to play with me because her mom told her not to play with me and so on.

I don't know what to do. I am trying my hardest not to loose my cool with her mom. I am trying so hard to be the best friend, sister and step parent to her but it's so hard.

Can anyone tell me what to do. What do I need to say to her. I am in dying need of some advice.

I am driving my self crazy because I want to be everything that she needs but that's not happening.

Note that I have been in this child's life for two years now. (She's 3)

Sooooo please someone help me.