I'm editing some tiny bits of this but the gist is the same.
Happily married man and i do the food shopping, but my wife is not interested in joining. Recently a colleague (same age, but single) moved locally. Colleague and I are OK friends but she doesn't drive, and as there is only the local supermarket... I have offered to take her, or if I bump into her there, offered to drive her home as due to our busy jobs, the time we can do the shop often coincides.
My wife is lightly jealous, i.e. she will make pseudo-jokey comments that most likely have grains if truth.
Strictly friends/colleagues... would you consider this dangerous? Would you be OK with it?