Living in Hong Kong, it is very difficult to avoid the cute mugs of the Twins grinning back at you from all angles. Whether it is music albums, advertisements, product endorsements or whatever, they are constantly right there in your face, being sickly sweet and cute, hoping to rub off their hyper-enthusiasm on to you. My wife Is 18 does not feature both of the Twins, only Charlene Choi, and this time she is paired with Ekin Cheng (who desperately needs a good film right now) in this good-natured comedy.

Sap Sam Cheung (Ekin Cheng) is over 30 and is still trying to get his Masters Degree in female pyschology. Maybe he lacks a female presence? Enter Yoyo Ma, a teenage girl he is bethrothed to. To satisfy their respective families, both Cheung and Yoyo decide to marry in England, but also agree to a divorce a year later. Meanwhile, Cheung remains in England and Yoyo hops back to Hong Kong as if nothing happened.

The real juice begins when Cheung decides he needs inspiration for his studies - and since he has a wife, why not study her? He flies to Hong Kong and stays in Yoyo's flat, not knowing that Yoyo's life is quite complicated. The bickering between the two is the foremost of the story, while we see the hapless Cheung try his best to learn about the depth of women's feelings. He should've bought a copy of Bridget Jones' Diary. Of course, the bantering between just two people cannot sustain a whole film, so the plot moves forward by having Cheung become a teacher at Yoyo's secondary girls only school, thus inviting lots of silly moments.

Since Cheung is the second only male teacher at the school, most of the girl students fancy him, including a young female teacher called Miss Lee - all of whom do not know that he is already married to Yoyo. A sub-plot develops by having Cheung fall for the nice female teacher, but when things start to nicely wrap up, Yoyo decides that she does indeed love her husband, and so a love triangle exists to the point that Cheung must decide whether to stay with his current teenage wife, or go for the more mature Miss Lee.

If you watch this film with the right frame of mind, you may enjoy it, but for others, My Wife Is 18 may come across as rather flat. The comedy is aimed at teenagers rather than adults, so you can imagine the dire situational comedy and witless dialogue. However, Ekin Cheng and Charlene Choi do put in nice performances, although it doesn't really stretch their acting capabilities, and it is all just a simple stroll in the park from start to finish. Charlene Choi is undoubtedly one of the "it" girls at the moment, and fans will relish just seeing her on screen, but Ekin Cheng definitely needs to find better material if he wants to remain a bankable star.

Overall, entertaining enough in its own right, but is more aimed at the teenage audience.