Both Camryn Grimes, who plays the younger Sharona, and Rachel Kimsey, who plays the older version, have both appeared on The Young and the Restless (1973).
Allison mentions to Devalos that she's been pregnant three times. This is not true, she's been pregnant four times. The first time she was pregnant, it was with a boy they later named Brian. However, that pregnancy ended in a miscarriage. (This is all unknown to the audience at this time. Allison and Joe briefly discuss Brian's death in the episode 'Sweet Child O' Mine'.) This could be explained as Allison not wanting to discuss a miscarriage with her boss, since he knows she has 3 children and not 4.