is already cuddling up to her brother-in-law to-be Evan Ross.
The 33-year-old singer shared a picture of herself with sister Ashlee Simpson and Ross right after joining image sharing site Instagram Wednesday.
Jessica appears in the middle between her sister and Ross in the black and white pic she captioned "Family Time."
Ashlee and Ross, the son of Diana Ross, announced their engagement Monday via Twitter.
A source told Us Weekly, that big sister Jessica "loves Evan and approves [of the engagement.]"
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