Well sperm will most definitely come out of the vagina no matter how thick it is. If you have been having constant sex before you just resumed, it will be abit lighter or watery like you said. It takes 3 to 4 months for sperm cell to mature. Tell hubby to Stay a while, say 1month and eat well, avoid alcohol and take lots of fruit and try again. There must definitely be a difference In Hubby's sperm