How do I find out more about her secret tattoo?

around last year at this time , these 2 girls that i know were talking about how they were getting their first tattoo's at a local tattoo place.

a couple days later the one showed off her new tattoo on her ankle but i never saw the other girls tattoo and have yet to ever see it

as i've seen her inperson many times since , can rule out certain locations that are clearly visible like ( arms, ankle , legs, belly ) , for some reason feel like maybe she got it on side ribs area as that spot is common for girls

but she doesn't really seem like type of girl who would have a tattoo and not sure how to ask about it but pretty certain she does infact have one based on what was said last summer and fact her girlfriend did really get one that day

How do I find out more about her secret tattoo?
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