Enough with the slut-shaming
Alicia is a woman who was a great mother and loyal wife in spite of her husband's disgusting philandering with hookers. If she wants to explore her sexuality or find love, it's never too late and she's not "too old to be acting this way."
Marriage is a complicated thing. Not unlike politics. She's more than paid her debt. Especially to Peter.
Calling her a slut is beyond the pale. If naive housewives who can't see beyond old-fashioned ideals of women and sexuality equate Alicia's bold expression of her sexual dynamism as slutty, then they should step out of the suburbs.