Julianne Phillips was his first, brief marriage.
No horses involved.
Patti Scialfa, his backup singer/slut was the second wife.
Her daughter is the one who aspires to Olympic equestrian heights, and failing to achieve that on her own, Bruce bought her a top-winning, gold medal Olympic horse, upon which she basically just has to cling, in order to ride better than she really does.
Any horse stuff came with wifey #2.
That would be the one.