i understand you worry the domestic helper cannont look after two kids. their ability is very low and unstable.
wait until your elder kid study kindergarten and then 99 cannot take the child out for a long time. maybe at that time the helper have enough energy to look after two children and then "out" 99.
when my kid studied in kindergarten, 99 also take my kid to her daughter's house(the same housing estate but different block and very near) after his dinner until 10:30p.m. or even 11:00p.m..when i went home after work to have dinner, my kid had left. you see the woman was so bad!!
his mother is one of the crucial reason to destroy our relationship and now we seperate. i suggest you use the properly way to handle otherwise....