Window acoustic treatment...

Unfortunately, I'm welded into a listening position that is against a wall that has an 8+ foot wide window directly behind my seat. At the moment, I've just got sheers up for some privacy, but have some good heavy curtains to put up and was probably going to add some blackout liners. Any better ideas? I could just wall it off with fire batt, but my idea to paint welcome on the backside (it's the front porch window) was explained to me as being the fastest way to never get laid again by you know who. Just don't know if there's a more elegant way of dealing with this as I just made a decent system upgrade and want to get the most out of it.
Thanks in advance.