Don't ask her how she feels man.. temp taking again.. you need to OBSERVE how she feels.. its less pressure for HER, AND you will get a more reliable reading
Even if she tells you no she's ok, that' dont mean squat lol
She may just tell you she's ok to avoid telling YOU that she feels stressed out...
The best thermometers are your senses, NOT your verbal skills
As for pub affection, hold off onthat.
What you CAN do is SAY something nice about her IN PUBLIC...
If someone says something about your wife like "she looks nice" you can just reply "Yes, she's gorgeous" or something... do NOT make a SHOW of it to HER, that is pursuit... but you can do it casually while she's in earshot
You can also try to be more mature with EVERYONE. if your wife sees you be more mature with others, she will start to feel she may be making an impact on you... she doens't need to see you be a better man TO HER, to anyone is a good start, and it avoids you pressuring HER