Suggestions??

Hubby and I are quite conservative, like missionary is my fave position. However, we are TTC and doc suggests intimacy every other day for days 10-24.  (8x) We both have stressful jobs and I'm looking for suggestions on how to keep him interested without making BD feel like a job during our fertile window. 
What can I do to keep him interested? I have plenty of fun clothes.  Thanks!