Um sorry guys, in case you are really excited about the 'scissoring' thing, it's a judo move. You hold your 'partner' (more like opponent/victim) down, disabling their arm and choking them with your upper body. That's why Keiko said 'why do you look like you are enjoying this' (guess Ran is a M).
Holding hands is an obvious hint though, and the part where Ran offered to go to Keiko's "other house" too. They sound like a married couple actually.