OK, I will throw in my 2 cents as a step mom, who is also a mom, and was a former s/o of someone who was a custodial parent.
Here is the deal, while the child is in residence at either parents home, it is that parents business where the child spends time when the parent is not home and who the child spends time with. Unless you are completely sure that the child is in DANGER, there is really not a lot you can do about it.
Now I can easily relate to stepparents who make the mistake here of saying "we" and "I" where it pertains to my stepchildren. In MY home that is what i say, because in MY home it is MY business.skids and visitation does affect my life, so it is silly to constantly use the proper wording. BUT I know that in reality the court does not see it that way, and as a mom, I am not about to step on my husbands ex, even if i dont like what she does. i play the game with her, but i expect to be consulted by my husband for my input on anything that will ultimately involve me emotionally or financially.What she does in HER home is HER business. i certainly dont want her in ours.
I also dont understand why someone would want to immediately remove a kid from thier mothers home on the assumption they can do it better. I will be honest here I love my skids dearly, and they have a mom they love, but i have no desire to be anyones mother but my own child, she needs me first.
first thing i would ask someone like jessicahmmm would be 'what does your boyfriend want?" because frankly, if you are more concerned or want that child living with you more than he does, you have a bigger problem. It is a hard time being a "mommy" to children who are not yours, especially when mom is still in the picture, having custody will not magically erase her from your life. she will still be there. And it will probably be more stressfull on you than the situation you are in now. I lived with a CP before i had a child of my own, it was hard, alot of sacrifice, i gave up a promotion at work, so I could be home more with children who were not mine, I spent money on music lessons only to watch his mom take all the glory at the recital. the mom went back to college, my S/O got promoted and I got dumped when pregnant with his child. I came out of that relationship with a beautiful baby, no job, and the sad hope the skids i will never see again benefitted in some way from what I did for them.
enjoy the time you have your future stepson, get to know him, be his friend. When he is not with you enjoy the time with your S/O become strong as a couple. Enjoy that alone time. We have our own child (he adopted mine) i dont get kid free time any more! It is much harder to be in a second marriage especially one with kids. Take it SLLOOWW.