OP back again
Nothing came of it in the end. On Sunday night, I diverted my phonecalls to another cell phone that was switched off just so that even the silent vibrations wouldn't bug me.
On Monday night I was in the cinema,so myphone was switched off anyway.
On Tuesday (last night) night, I called my mum for a general chat, and she didn't mention the guest coming. I didn't bring it up because we were talking about famiy things and then the opossbility that she might be stranded in the Old Country because the she flew in with has gone out of business
. On my end, I had a*incident* during yesterday's lunch hour which led to me filing police charges. I was trying to tell her about this but it felt wrong to burden her with that information when she's thousands of miles away. So basically, the guest situation was fairly low priority(!)
The family friends haven't called back so I dont' know if they've just accepted the 'no' or they feel slighted. Either way, if there's a fall out, it can come much later.