No way. How do you know your maid take sometimes off to her boyfriend's place. I mean if she goes to Park N shop the receipt will show the time and I always ask my maid she needs to call me before she leaves & come back so that I can check how long does she takes for shopping. And she can not cheat the time.
I mind the maid doing what you have described. You may say I am selfish not to let her meet her boyfriend. I mind even if she has boyfriend in HK and only meets during her holidays. Yes, she has her right, but in my selfish opinion she must be absent minded in her daily work if she has love affairs in HK which is so near to her. How can she be careful in taking care of your children. Bear in mind that when we have our job in the office all we take care of is documents/papers/ meetings, etc, which is not living thing, but our maids' job is to take care of our children, real person whose lives are so important.
But after all, I realise I can't stop her meeting her boyfriend as she may have her right. There are many other maids without boyfriends in HK. I think I will change for another new one if I were you.
By the way, how do you detect what she has done(meeting her boyfriend)?
My maid is the same, she meet a boyfriend on Jan 2005, then borrow money on Feb, I discover in March, now waiting for a new one before terminate her. She talked too much on the phone, more than 3 hrs/day, always waiting for phone calls and SMS. Pay no attention to my son, always stay at toilet or kitchen. Always emotional, argue and cry at mid-night. Cannot bear her anymore.....