Of course, if a Master asks to send, I will tell my Owner. If He thinks it's a good thing to do, He will instruct me or leave me the choice. I imagine He expects a compensation and has the right to do so: his property is being used by a colleague.
You A/all know how it works with my Owner: i pay Him the same as any tribute to another Dom ; i need however to add there is a DNS (do not serve) list of Masters He has forbidden me to serve, and of course i respect that.