Yes, your W will be served with separation papers (unless you choose to give them to her or she waives her right to counsel and comes to your attny's office). How do you think the separation happens without her getting the papers?

You have been married for four years. It is a "young marriage" by law therefore the spousal maintenance might be 2 years at best. Your W is a young and healthy woman and anything more than a few years can be fought in court. You are not even close to reaching "vintage marriage" status which is 10 years in most states and that is when the big guns of support come to play.

Was your son born out of wedlock? I see he is 4 and you have been married for four years.

I don't know what state you live in but the entire point of a separation agreement (filed so yes, you can file just not a dissolution) provides the framework for the dissolution.

What you are doing is not easier on both of you (no structured custody schedule). It is causing drama, too much contact and too much back and forth for your son.

You don't seem very educated on the laws of your state (it's not a slam, just an observation). Does your state work off a set formula or criteria for support? Knowing the facts will help you determine what you are up against. Either way, your young marriage works in your favor.