Sexual play is very closely linked to dominance. The most important issue here is your reaction to her behaviour. Ignore her, don't look at her, talk to her or acknowledge her in any way when she does this. If she starts to pull on your clothing stop whatever you are doing, cross your arms, turn your back on her and look at the ceiling until she stops. With the foot thing, ignore her, stop any contact with her and either stand up and cross your arms and look at the ceiling or simply pull your foot into the chair/sofa you are sitting on. Ignore her until she has settled down and is lying down away from you - trust me, she will get bored of pestering you...eventually....if you give her no reaction. Without the reaction from you there is no point in carrying on the behaviour.

WARNING - it will get worse before it gets better! If you ignore her she will try harder for a reaction before giving up so you have to be strong for a couple of days. Even when the behaviour begins to subside she will occasionally try it to see if it has a chance of working again - be prepared!