Regarding the CARES Act, is this stimulus incorporated into our 2019 return, or is it separate? Also, would a widow that filed married/jointly receive both, or just hers?

I'm trying to estimate how much we are getting back for future expenses and large purchases, and for a family of 4 $3400 is a wide margin of error I would like to avoid. I am sure it is separate, but I don't know that for sure.

If a widow (as of Dec 2019) filed both of their 2019 returns, his property is in an estate, would his estate get this stimulus package? would his widow? would he even be getting a stimulus package?