This was a cute, quick read/
Rich, handsome playboy runs a polo school. Local mom signs up for classes while her kids are out of town with their dad for the summer.
She can't ride a horse well and it's obvious.
She gets stepped on by the horse, and the playboy helps her home, and ends up suggesting his cousin, a bit wild and scatterbrained woman, stay with her while preparing for the cousin's wedding.
Then some robberies in the mom's neighborhood raise some suspcions.