My ex-wife won't let me see our son.

[vernmoore]

We filed for a divorce through https://onlinedivorcer.com, and didn't discuss the issue of my visits to our son, because I thought that this shouldn't be discussed, my wife never opposed me spending time with him. But for six months, my ex's new boyfriend has been living with my ex and my son. And now I rarely see my son, because Mark (this is the name of her new boyfriend) needs to be with him on the weekend (which used to be my days). I'm very worried about this situation and have repeatedly asked my ex how she feels about the fact that I want to spend time with our son. She always answered positively. But in fact, everything testifies to the opposite. I'm scared to think that she will eventually forbid me to see him at all. What can I do if she does? Thanks for any advice.