no don't worry about the paint. in most cases the only paint that would even be a minor issue would be lead-based paint. i suspect you were using latex or oil-based paint. if it was dried this is not going to create risk your wife but for goodness sake wash your hands next time before you get amorous. no woman wants a painted hand caressing them.
touched pregnants wifes vagina with hand that had dry paint on it. help i was painting and got quite a bit on my hands. i then later that night became intimate with my wife who is 6 weeks pregnant. i touched her vagina with the painted hand. should i be worried about her exposure to the paint?