maybe even late 80's. English/British.
Couple have a baby, but the husband falls in with some new age types that the wife hates.
Wife comes home early from work 1 day and the big hippy lady is breast feeding the wifes baby.
Hippy + dad think its fine but the wife is outraged.
No idea of any of the rest of the show and don't think it was the Buddha of Suburbia as I remember most of that.
Puzzled me now for ages this has.