Is the actress that plays Shanice...

no she wasn't, she's a real woman IMO.

This was really the quickest way to get an answer? You couldn't just type Amy Madigan into a Google search?

Jesus, here you go, open up while I spoon feed you:

https://en.wikipedia.org/wiki/Amy_Madigan

As you can see she has been married to Ed Harris since 1983 and they have one daughter together. Enough confirmation of her sex and gender for you, I trust.