Massachusetts Premier Buyer Brokerage
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So it seems that you have made a counter to a counter.
Maybe the new offer is still not what they are looking for.
Sometimes no response is a response.
(Please note: when you choose an answer as a Best Answer, or at least give a thumbs up, it helps those who answer questions here.)
There's no requirement or obligation that any seller respond to any offer. Strategically, they should, but it's up to them.
Incidentally, a second offer isn't necessarily the bottom line offer. I know people who've made 4 or 5 offers on the same property.
Hope that helps.
The spring market is when most people list their homes. Many houses are about to com onto the market so if you get a rejection or another counter you should wait and see what elese comes up for sale.