I recently signed a horse lease in Ohio with an individual 3 weeks ago. The contract states that the individual was to pay me $15,000 upfront for a one-year lease, in addition to the horse's monthly board and vet bills. The contract also states that I (the owner) am allowed to ride the horse once a week based on the individual's schedule for the duration of the lease. However, the lease contract does not specify what type of riding (jumping, flatwork, etc.) I am allowed to do. I rode the horse yesterday and jumped him over a few fences (less than 2 feet), which is nothing compared to what I usually do (I've ridden for over 16 years and competed with this horse for over 6 years). Now the individual is saying that she wants to either end the lease immediately and return him to me, or renegotiate the lease so that I am not allowed to ride him for a year. The reason she wants to end the lease is because I was never "allowed" to jump him. However, nowhere in the contract did it say this nor was I verbally told this. I am considering just ending the lease, rather than renegotiating because the individual hasn't been taking great care of my horse and isn't the most experienced rider either. Will I be required to return the $15,000, if the lease contract never mentioned anything about ending the lease early? And would I face any other legal issues, since the individual is the one who gave me the two options in the first place?