Probably wise to ignore, though I am nosy/curious too!!
1) She wanted to show you how "in love" they are, to prove you wrong (as some PPs suggested)
2) It's really the guy, and he wants to tear a strip off you
3) It's really the guy, and he's hoping for Scrabble with three players
4) She's found herself in a bad situation, realized the OP was the one who had tried to warn her, and now wants to find out more, but is afraid to say anything revealing over email as the guy is reading all her emails.