Rescission of contract combined with dissolution of co-ownership, assessment of rent, and damages between former spouses. Preliminary objection based on an arbitration agreement dismissed. "The 'advance on inheritance share agreement' is intrinsically related to the determination of the amount of alimony owed to the former spouse. The direct treatment of matters involving non-waivable rights (alimony) excludes the jurisdiction of the arbitral tribunal and renders the arbitration clause null and void":