YAY im so glad you didnt DTD when the first OPK was +, now the one today is darker...yay!!! Youre getting closer to ovulating. I have a question for you, did you DTD any time this week? Because its best to hold off on sex (in my opinion) for a week, if youre swaying boy and BAM do it when you get your 2nd day of a + OPK. I would say that youre good to go tonight. To help in swaying boy, (this will sound crazy but...) try and put some egg whites in your vagina, its helps change the pH of your vagina so the boy swimmers have a better chance. Also do deep penetration such as doggy style. Good luck, hope this is your little boy in the making.
Side note, how do you like having two girls? I always wanted two daughters