i work at a swimming pool as a lifeguard, where one of my coworkers is a hb9. today, three of her friends (two hb9s, one hb7). The four of them were outside talking, when the 7 asks me if i have a lighter. normally i would not have done this for obvious reasons, but i walked to my car to get a lighter because i wanted a cigarette. When i get back, i hand her my lighter and she says "she never would have done that." i tell her not to get a big head, its only cause she is giving me a cigarette. she says "i don't have anymore, but we'll share this one."

later that day, i was on stand watching the pool. not too long after i had sat down to start my shift, the 7 jumps in the pool around the guard stand. this was surprising because whenever they come by they chill at the other end of the pool. her friends follow her, and the whole group is in the water around ten feet from me. the three 9s all hand their backs to me, but the 7 was facing towards me. the set remained like that the whole time. just before the next lifeguard makes it to me for the end of my sit, she hops out of the pool. are these passive ioi's?

Yeah I'd say there's a fair chance that the HB7 was interested. Just keep talking to her and you'll soon find out if they were IOI's.