I've been looking at the expert forum past answers and found the following
post (yes I know this is over analysing the situation)
http://www.medhelp.org/posts/HIV---Prevention/Condom--Massage-Oil--HIV-risk/show/1507250
It is an old post but I guess the advice still applies.
Dr Hook said:
"oils and other petroleum product do weaken condoms. When they do however, they increase the possibility that the condoms will break, not that they will otherwise leak. Thus if your condom appeared intact it almost certainly was, making the activities you describe safe sex"
I'll stick with Dr Hook's advice since I am almost sure seeing my ejaculate inside the condom when withdrawing from her.