More importantly, why dont you want to bang all of them?
I did my best to leave the door open with Laezel in the future.
I believe this was brought up as a bug previously, but it's fairly rare; I haven't had it happen to myself.
From what I read, it just makes all of your companions jump you at the same time like that. Not sure what causes it.
Seems like it's happened to a number of folks in this thread. Perhaps not all that rare...