Ms. Wong has long taken political heat in Malaysia because she is 37 and single.
This is another case of male fear of female sexuality and female Independence. This tends to be a pretty standard feature of human culture: female sexuality is seen as something that needs to be controlled and ordered, don't dare let it get out of hand!
Sad that there is still so much of this fear and need to control in the world. We are in the 21st century now, it would be nice to see a deeper appreciation of female independence and sexual expression.
The BBC has the story in more detail. And the following video explains the events: