How do you?

So were trying for our rainbow and I’m trying not to put pressure on my fiancé but I got a positive OPK and I’ve got fertile CM right now. So how do I convince him to BD without putting a lot of pressure on him? Like what if he’s not in the mood and then we miss our window? I’m nervous. We BD the last 2 days but now I have the really fertile Cm so I’m nervous that we might miss our chance