Katie was at Worx Studios in London promoting In The Name Of Love (her book rather than the U2 song of a similar name) which pans out roughly as follows:
"Licking her wounds in Barbados, Charlie meets the irresistibly gorgeous Javier. Instantly attracted to each other, they begin a passionate love affair -- but when he discovers she's a journalist he walks out with no explanation. It is only then that Charlie finds out that Javier is related to the Spanish royal family and is the lynchpin of the Spanish showjumping team."
So when you get down to brass tacks the horse is of some relevance. Probably more so than the reindeer costars she hired for Santa Baby, so... congrats?