When do I get to meet the kids?

I have been dating this guy for a month now,he has met all my kids and granddaughters.I still have not met any of his kids.He is separated,not yet divorced and thinks its to soon for me to meet them as he and his wife have only been apart for 2 months now.They haven't been together really for 2 years,but she finally moved out.I am wondering is she really gone,why am I hidden...help me please as i am worried