By Danielle Kate Wroe Valentine’s Day is meant to be romantic, frilly – and in one man’s case, threat-filled. Keeping secrets from your wife is never a good idea, especially when they concern another woman, and it turns out that ‘Paul’ could be in a spot of hot water. A manhunt is underway to find out who the man is after a poster appeared in Dublin 7 this morning (February 14) and people have been cringing at how much trouble he may actually be in with both his mistress and his wife if she finds out what he’s been up to. The plucky poster reads: “Paul. Tell your wife about us or I will! Happy…