Is it possible 2 be happily married and in love and still love the mistress u had a son with?

Ok...my proffesion allows be 2 be out all week so my wife is used 2 me being home on the weekends only. I am happily married to a good woman who does not know that I just had a son with a woman who lives 4 miles from my house. I help support the child...I'm with his mom 5 nights a week...I do all I can 2 help her out in every way imaginable. I love her...and I love my wife. I have no children yet with my wife of 5 yrs...we have a beautiful home...make good money..etc. The mother of my son has been relentless about getting me 2 leave my wife...which...even though I love her too...I don't intend to do. Is there ANY way That I can make this woman happy? Or is she always going 2 be driving me crazy no matter what I do? I do what's best for our son financially to the absolute best of my ability...however nothing seems to please this woman!