You all really kill me. You really take something and run with it.
"I" don't know how she treats them behind closed doors? And you do?

Ok, sure.
Look, I certainly am not going to get in a debate over something that I am not even seeing or experiencing first hand (thank GOD!) but I do know the family. And no he is not a "momma's boy". They live seperatly, he works, pays his own bills and makes his own decisions and up until the last couple of months seemed to make good decisions. She doesn't get involved in their lives. She just doesn't. She is a grandma that loves her grandson. She babysits for them, he has over night visits on the weekends and she takes him to the park. All the little grandmother things. She doesn't get overly involved in their life. Its the same way with her other children.
If she had "kidnapped" her grandson and her son and dil felt she was wrong they could walk to her house and get him. She doesn't exactly have guns aimed at the door. They all agreed that it would be best until things settled down. She isn't keeping him forever nor does she even want to, we are talking through the weekend--max. She just doesn't want him subjected to the crap that is going on at their house right now. And guess what, he shouldn't be. They should have asked her to let him stay with her in the first place, it would have been the best thing for him. If his parents don't have a problem with it, I really don't get a bunch of strangers getting all up in the air about it.
The original question not about the woman's grandson, it was about the possible pregnancy. There is so much more to this story that involves what has been said about this other woman but I don't know her and neither does my sil so can't say that it is all true. They have never met, never talked, she doesn't even know sil's name or anything. But her son's friend says that the woman is very recently divorced and has a very young baby (less than 6 months), she parties a lot and spends a lot of time in bars. She also has an older child that lives with his dad (the man she is divorced from, but there seems to be a question of the baby's parternity). IF all this is true, then YES there is reason to worry about the possible grandchild.
And DN didn't "have an affair", he had a one night stand. If there is a pregnancy, a DNA test will need to be done. So this girl who everyone wants to paint as "running off into the night to protect her unborn child" is not doing that in the least. If she wanted to find her, she could probably just go to the popular club in town and ask around. But not doing that.
We are talking about some MAJOR bad decisions going on by every party here. And some that seem to be a habit if all this is true about this woman.
I completely disagree that it would have been better to call CPS instead of just going over and saying "Jack, you want to come spend the night with grandma". Certainly a lot less traumatic for the child, and again NO ONE in the child's life has a problem with it.
Since I first posted this, sil has had a lot of time to think and talk to her husband and a lot of time to calm down. She isn't going to do anything to try and get in touch with the woman. Her hope is that in a few weeks, Dn will call or see the woman and talk to her about it. Other than that, she now feels more sure that he will see people that will see this woman and will let him know if she is pregnant.
G
oodness, I never realized I would get so slammed for something that isn't even ME! I was just upset for my family member and worried for her. But, contrary to popular belief I do know this woman and SHE isn't the bad guy here. There are plenty to go around but she isn't one of them,