I'm not sure what Sam's game is... she probably knows that she won't be Sophia jealous by going out with Clara. If she thinks she'll make Sophia happy by driving Elle into Sophia's arms because of jealousy, she's mistaken. If that was going to happen it would have happened already. If she thinks she's going to get over Sophia by dating Clara she should look at how well that worked for Sophia dating her... the only thing I can think of is that she's trying to hurt Elle in the same way she feels Elle hurt her because she thinks that Elle is the only one in love and Clara broke up with Elle because she doesn't love her anymore, so she wants Elle to know what it feels like to see the woman you love fall for someone else? But she'd be wrong about Elle's love being unrequited...