Are you ready for my advice? (and if you can't tell tongue in cheek, go away)
I was thinking, if he isn't going to be able to have sex with you on a night you are ovulating, you can save sperm the following way:
1. Get him good and drunk
2. Give him an amazing blow job. There is a technique involving a peach on my blog (link in my siggy)
3. Pretend to swallow, but hold on to it in your mouth. You got him drunk so he won't notice the next part
4. Spit it in a tupperware container, mark the container as something nasty, like liver, so he won't ever touch it.
5. Stick container in the freezer until you ovulate
6. When you need it, stick the container in the microwave to heat it up
7. Graba turkey baster or meat injector and pull the sperm up into it
8. Insert baster/injector into your vagina, making sure you are laying flat on your back, with your butt proped on pillows in the air
9. Squeeze his sperm inside of you, and remain in this position for 2 hours, so the sperm has time to make it to the egg
Now, the freezer will kill all the X sperm, and leave the Y sperm alive. So, this is a sure fire way of getting pregnant, and having a boy.