Going crazy with my own kids!!!

[Mambia]

So for those of you who have your own children with you during the day along with your dck, what are your experiences with your children? I am literally going nuts and feel like a time bomb waiting to explode. I have 2 kids of my own, one of which is 3 yrs old going on 15!!!! As well as 3 dck

I know 3 is a rough age as they tend to be opinionated little people who know what the want and when they want it but wow! Being around the other dck seems to bring out the worst in my child. Every toy that another child touches all of a sudden belongs to her, she has to be first at everything, etc etc. the concept of sharing just doesn't exist no matter how many hundreds of times I say the word during the day. I feel like all I do is concentrate on disciplining her an as though she is the root of all chaos during the day. I know this is so horrible to say of my own child but its true. Even the days where my hubby helps out, he can't believe how bad she is. HELP please!!!! Any suggestions on how to nip this in the bud. I know it's her home that she all of a sudden has to share with others along with her toys and her mommy so in essence it's not fair to her but at the same time, she has to learn to get along nicely with others without so much chaos!!!! This just makes for such long and unpleasant days, most of which I think to myself that I'm just not cut out for this job