That's excellent! But here is something I want you to think about. What would have been wrong with hugs for the kids when you left the in-laws and that's it. A friendly good-bye and thank you from you and then leave. You see, his mind is working overtime also. It isn't just yours. Let HIS mind work for YOUR benefit. You so good night, your happy, you smile, just like if you were dating. Then he is left to wonder. Why is she so happy? She and the kids sure have fun. What am I missing?
Also, you wanting him to call is an expectation. You must keep expectations to an absolute minimum. MUST! An unfulfilled expectation will set you off in a heartbeat. I would also suspect if you look back on the M,it is the expectations on both parts that caused some heated discussion. This gets back to the cyclic behavior. A+B=C. (Tell me I'm wrong and I'll go away) This all relates back to the communication skills you have developed throughout the relationship. It isn't rocket science.You simply need to develop different ways of saying what is on your mind. It's all in presentation.
Have you read DB or DR? If yes, re-read it. It is a great refresher. As with anything else we want to understand, educate yourself. Search the web looking for relationship tools, you will be amazed.