In my experience, the peeing inside things is either laziness or domination, especially in a male dog that is not desexed.

Do you allow your dogs on the furniture? Do you feed them before or at the same time as you?

And is he desexed?

When my young male dog came to be that age, he did it inside once, and I handled that by putting him outside overnight, he didn't try it again. But from that day it was a wake up call for me. I made sure that my kids were never on the floor or ground with him, like lying down so they were beneath him. They are fed about 2 hours after the family is and I never allow them on the couches, or anywhere where they are level with us.

I'm not saying that's your problem, I'm just thinking of in my experience with peeing inside male dogs that it is often a domination thing, that they simply feel they can.

My IL's have a male dog which pees inside constantly, especially when they bring it to my house. It their case, he is the dominant dog out of 4 and they treat him like a baby, he gets places on the couch over me and my children when they are staying here. And when we have tried to put him outside as soon as he pees so he gets it, MIL lets him straight back in and he just goes back and does it again.

It's very hard in your situation because there is an older dog and he has been in that habit for a long time by the sounds. My male dog was easy to train out of it because I nipped it in the bud the first time he did it, but for a dog that's been going that way for a long time it would be very hard.

I hope some others have experienced this and have some good suggestions. I know exactly what you mean about a baby coming and you want this to be over now, it is part of the reason IL"s are not allowed to visit with their 4 dogs anymore, is because the peeing thing gets out of control and they don't clean it up, it really bothers me about that now, but when a baby is in the house it will really bother me.