I am a sahm of 3 boys, ages 7, 5 and 2 1/2. Our first son slept in the bed with us from day one. When our second son was on his way, we tried to get him in his own bed before baby 2 arrived with no luck,and we did the tough love in your bed, it worked after 4 nights, but half the time he would still end up in our bed at about 3am. Then when baby 2 arrived he was right back in our bed. He had been in his own room for about 3 months previously. Fortunately, bay 2 wanted nothing to do with our bed. He would wake up and breast feed in the bed with all of us and then go right back into his bed. He never slept in our bed, and let me tell you as thankful as we were for that, there were times when we wished he would sleep in our bed and cuddle,my DH included.
Now, when baby 3 arrived our oldest so had already decided to sleep in his own bed. It was almost like one day, when he was 4, he decided he was ready to sleep by himself, I really think that there is some truth to a child just not being ready to sleep by themselves. Believe me we had tried everything, I was beginning to think he would still be in the bed with us when he went of to college, j/k...
Well, let me tell you baby 3 was just the same as baby 1, he wanted nothing to do with anything that was not our bed. Again, I am back to putting him in his bed to sleep and some how he finds his way to our bed sometime in the night, and yes there are days when my DH and I are like he has to start sleeping in his bed, but most of the time we love it. I guess we realized how quickly it goes by, and soon enough he will not want to cuddle in the bed with mom and dad. I would not trade co sleeping with my 2 boys for anything it really has been special...
I don't know if this helps you or not, I know I rambled on, but I just remember being in your shoes, and thought I would let you know from a mom who has been where you are. Congratulations, on baby 2 and best wishes to your family!!!