If the morality clause is a deal breaker for him it might be best to let it go. I tried the same thing and it got shot down. The WAS sees it as an attempt to control their actions, not an attempt to protect your D. Unfortunately you will just have to make sure your D knows that it is wrong and why.
In my sitch I could see it coming so I addressed it ahead of time. I made sure the boys understood that it is morally wrong and why. Sure enough, 2 weeks later they came back with big news that WAW had her AP stay all night. The worst part about it all? The boys had a friend stay over that night too.


M42 W40
T17
M15
S13 S11
BD 7-14
A discovered 7-14
WAW moved out 10-3-14
D final 2-23-15