The only boundary I have that springs to mind is neither my husband or I use our bedroom for dates with others when the other spouse is in town. This is because even if you have plans to be out for the night sometimes things don't go as planned and you want nothing more than to retreat to your own room. Also if there is sexual activity in either bed in our house it is the person who was involved job to wash the sheets promptly.
Other than that I just ask to be kept in the loop. I figure I can't actually control anyone's actions except my own (even around safe sex). All I can ask is that I'm told what is going on so that I can make informed desisions for myself.
Everything will be ok in the end. If it's not ok it's not the end.