Interesting premise but Steve's rationalizations seem a bit off. Maybe it's just me though, but I can't see him being ashamed of wanting Tony. Maybe a bit embarrassed and not wanting Tony to know but.. like I said interesting premise and I like how you've had Steve fetishize the armor.

Minor note: NC-17 not PG-17. NC-17 or Adult tends to be the rating for adult materials so PG-17 might confuse some people. ^_^