Can a babymama who you have been with for 8 years can be a rebound?

Im just asking this questions because i ask the father of my kids he says no because thats the mother of his kids not a rebound but if u were dating someone for a year they leave you and both of your baby then ur ex babymama comes back into the pic and u having sex and cuddle and she comes over every night. so do that considered a rebound?
Can a babymama who you have been with for 8 years can be a rebound?
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