There are, as you may know, three types of kino
Light kino: handshake, high fives, punching her shoulder etc
Medium kino: Pushing/pulling, tickling, one-arm hug etc
Heavy kino: Touching the face, touching lips, close hugs, kissing etc
If you receive kino, then yes, this is an IOI, the more "heavy" the kino, the more she is interested in you. If, as you're saying, she took your arms and put them around herself, then I would consider this major IOI.
Of course, she might be one of those people who are naturally touchy-feely, don't put too much emphasis on one aspect of the interraction. Check the IOI list to see which signals she was giving you. If you have more than three, go for the kiss
