lmao, did she think you meant all four of you or just the 3 girls?
i'd recommend you do the individual 3-ways first, see how they go, and if it all works out you can take it to the next level and go for the 4-way
if you can't organize a 3-way you can't organize a 4-way, if you don't have the stamina for two women, you won't have enough for 3 (unless at least one of them is satisfied by mostly playing with the other girls), etc.
so get some practice and experience first, test your limits, and THEN you can work on the 4-way that will make you a legend.
if you can't handle 3 girls at once i suggest you buy a video camera and suggest the 3 girls do a 3-way
well once you've got them acquainted and they're all for it, i'd probably suggest that you get the two girls together first and then you prep yourself (pep talk in the mirror or something) then go in and join them (start the party if it hasn't already)