i am almost 100% sure
at the highwind , when there are 7 days left till meteor hits ( wonder how they knew it's exactly 7 days ) after everyone "leaves" for their own personal issues .
Cloud and Tifa are the only ones who have nowhere to go, so they stay near the highwind...
they chat some and then after a while tifa says:
"Words arn't the only way to express feelings..."
-Fade to black-
Same scene, only Tifa leaning her head on cloud as if she has just been very satisfied and have made some love with him.
he ofcourse being the man doesn't feel comfortable with this ( most guys actualy don't do after sex, o love it btw, my feminine side... :P ) and says "
we must go now" which only makes my point stronger!!!
then she says , as all girls do say after sex, "wait! just a bit more" or something, and he being the man has to agree... otherwise you know what's up for him/us
so anyway, in the next sceen up onboard the highwind....
suddenly everyone appears and then tifa says , "what?? you guys didn't leave?? then you must have seen it all!!!"
ofcourse she means "see it all" as in her and cloud going at it making love below the highwind
any comments people?
P.S - this ofcourse makes cloud and tifa the official ff7 couple.. they had sex after all, no??? and TIFA LIVES, AERIS DIES... so it's hard being a couple when the girl is dead!