Saying such things about people we know is even beyond our ken, let alone about men far more subtle and dead than we are. Let's limit ourselves to considering whether Locke's written work is consitent with regard to natural law and some recognizable concept of God, shall we?
I would also note that Rousseau believed that men and women should love each other, and that therein lay happiness, whereas for Locke as far as I can see the only good reason to have a wife is for more property from her and the kids, and maybe to satisfy and itch now and again. Look through all of his work, and find the word "love." I don't think it's there. So the least I can say is Locke is working off a concept of human happiness that I don't quite understand.
I would have to disagree with Rousseau that happiness lies within love between man and woman.
You shall Love the Lord your God with all your heart, soul, mind, and strength.