Just to clarify, you'd be fine with Brexit winning as the 3 Brexit votes represent more than Remain?
If the three Brexit groups decided to work together and form a coalition then no, I have no issues with that. It would also hinge on all three deciding they wanted to work together towards Brexit and one of the groups wasn't happier forming a coalition with the remain group.
That may sound confusing, but as we were discussing elections I assume you're not actually using that example to indicate a non binding referendum question? In that case the situation is totally different as already mentioned (and the question should not have got past the election commission as I have already pointed out).
Perhaps what you should have asked is if the result ended up as:
Conservative - 30
Lib dem - 45
Labour - 20
UKIP - 3
BNP - 2
And whether I would be happy if the conservatives, labour, UKIP and BNP formed a coalition without the lib dems. No I wouldn't, but at he same time I'd acknowledge that they have the right to do so.