<human>: Can you succinctly summarize the text in 1-3 sentences?

Before I begin, both I and my future wife are in Wisconsin, USA.

However, we are planning on this being only a temporary marriage. I'm gay and want kids and she, after having a rough childhood, wants stability and someone who can be at her side to help her into the future.

We were thinking about looking into a contract- a prenup of sorts that would lay the foundations of a temporary, 5 year marriage since that'd be plenty of time to have kids while providing her the stability to finish up college. We were looking to define the terms within a context of a prenup- near-separate finances only share the costs of living that affect us both while also helping to take care of the kids. As for the children, we were looking to defining the terms of custody with the terms being something comparable to every other week.

Ultimately, we plan on the marriage being fairly open and we are only intending it to last 5 years with a divorce that will hopefully be as clean cut as possible.

So with all of this in mind, what, if any, legal ramifications do we need to be prepared for? (We're in the US btw) How would we go about establishing this contract and how effective would it be in a divorce? We still intend to be in each others' lives as friends and may even share a house or a duplex so that the kids can be around us.

And finally, what would be the best way to go about explaining this to our families? Has this kind of thing been done before and is there has there been any research looking into the total effect of such a marriage?
<bot>: I and my friend are looking to enter a utility marriage and we want to know what the best way to do it is.