Theresa May is desperate and biding her time - she's doing this deal with the DUP so her Queens speech isn't voted down, resulting in the Queen inviting the opposition to form a government. 

It won't work out. The DUP is way too right wing for Britain. The country (not me personally) that refused to accept authority coming from a supranational organisation certainly wont accept it from an ultra right wing, lunatic, fringe party.