umm i am not much in the "endure" department..i usually can pump non-stop for 5-20mins (varies depending on my mood?) before off loading.
No my gf dun cum everytime we do it, at least not from intercourse
i can tell when she fakes it..Sometimes when we do raw she will just get on top and continue to ride away right after i climax (usually can remain hard) until she climaxes
But to make up for it I do make sure she climaxes either during foreplay or after i cum.