Ah, reading comprehension is hard! It's always difficult explaining this kind of stuff online, and everyone is so different - in your situation I'd be glad my MIL spoke to her son, not to me, but that's not your experience. So it can be hard to give a definitive opinion.
Tired today! But C slept 6.45-6.10 with one wake around midnight. However, stupid me jumped up and fed her too quickly - by the time she was in my arms she was asleep again. Our guests left today; I think we'll sleep in the living room again and see how she gets on. That way I'll only feed her if she really needs it, not because I sleep lightly and jump up at the first sign of rousing. I feel like we could be on the cusp of sleeping through - the other night she managed 9.30-5, but I know she can do better than that. I just want one night of sleeping through, so I know it does exist!
Sorry to see our guests leave today. They love London so much, they're wonderful to have to stay because they enjoy themselves so thoroughly. They're getting married next year, and while he is ready to have a baby ASAP, she wants to wait a few years and has been upfront about being daunted and a bit scared. But today she said 'Seeing you with C makes me want a baby.' So that's pretty cool! They'll make wonderful parents, I can't wait.