Is it safer to have sex at certain times of the month on the pill?

I know that on the pill you don't have a fertile window but is it safer to have unprotected sex after when you were meant to be ovulating? I want my boyfriend to cum inside me once, I have been on the pill for 4 months and take it same time everyday. Is it safer to have sex during a certain period of time or is it the same all the time?