Basically, we're selling a flat, and our buyer is now unproceedable.
We had an offer on the table from another buyer for £10k under asking, who our EA said was really keen to buy as her first home. They were confident that she couldn't increase her offer, but said she was leaving it on the table incase we reduced.
We're keen to keep our chain together, especially as I'm pregnant, and so on Thursday last week, we contacted the EA to confirm that the offer was still there.
Somehow, they were then uncontactable until Saturday, when they called to confirm that they'd asked the buyer if she was still interested, and would get back to us on Monday morning.
We didn't hear from them until late Monday evening, with a question about the ground rent, which they already knew the answer to, but fine. EA said she'd pass it on, and asked if we'd mind emailing over the extra info to be added to our file...
Yesterday they confirmed that they'd forwarded that email to the potential buyer 
And we've heard nothing else. We were clear on Thursday that we would accept the £10k hit to be able to tie things up again quickly because we had mortgage appointments and things this week...
I'd like to email and reiterate that we are happy to accept that offer if she's still interested, but on the condition that it's agreed quickly, to continue the chain. If we have to wait much longer, we'd be better off to continue doing viewings...
How do I word that without sounding really bitchy? I don't want to upset anyone, but the stress of dealing with this while on the EPU is driving me mad. Our EA has been dire throughout.