Totally agree with comments from Ox Jess, my parents in law are the same, very nice people but giving out unwanted advices all the time.

The way I deal with it is, to reduce the frequency of contact as much as I can.... When they ask us what our plans are during weekends/holidays, I tell them (sometimes to my own parents as well) that we are having dinner with Friend A, going to the birthday party of Friend B or go shopping with Friend C.... the truth is me, my hubby & our baby just stay at home all day enjoying our own family time :p