first things first, get the 80 grand part out of your head...

do you love her? THAT is the main question... if you do, you should be able to work through it...

not to be a dick, but hows your weight? could both of you maybe go to a gym together once or twice a week and work out together?

exercise can increase sex drive quite a bit... you could even start with walks around your neighborhood... do it WITH her...

i dont have any answers on the kid situation.... be a dad is all i can tell you...