Females getting off in public?

if a female is in public sitting and she is turned on to the point she needs to relieve herself can she masturbate (and possibly get off by swinging crossed legs in a way that grinds pelvic "area" against chair without drawing attention to herself except those females who know what she is doing cause they've done it themselves? can a female tell when a guy is doing it as well cause I've sat next to a female on bus and was getting sexual signals from her and she was swinging crossed legs and had hand between thighs. she saw I was trying to cover my arousal while I gave her hand massage
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PLEASE ONLY FEMALE ANSWERS
Females getting off in public?
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