I dunno. If there is a hung parliament but tories plus lds gives a clear majority, we're exactly where we were in 2010, parliamentary maths-wise. What was the lds' biggest 'idea' in that election? Scrapping uni tuition fees. What did they do? Agree to triple them. The rationale, remember, from Clegg, was that they had a democratic 'duty' (I believe he used that word) to form a govt with the tories because the tories were the biggest party.
Ok, so we'll vote for brexit when we said the opposite and said the opposite in the strongest possible terms, but we'll be in there making sure it's a better brexit. Tories could use them then as a front behind which they could agree very close alignment with the EU for the foreseeable future, something they'll almost certainly have to do anyway, but which they can blame on the lds as the price of getting any kind of brexit through.