Ciara 'Dumps' Future, Engagement Over, No Ring! Baby Mama 'Devastated' After Tyrina Lee Cheating RUMORS, 'Game Over' [Instagram PHOTOS]

Ciara is totally over fiance Future's cheating ways - apparently, the hip-hop engagement is officially off.

As Mstars previously reported, rumors suggested that the "Real and True" rapper was "creeping around" behind CiCi's back while she was busy taking care of their newborn son. He was allegedly "hooking-up" with personal assistant Tyrina Lee AND may have gotten a sexy groupie pregnant...

Future Baby Mama Drama Amid Ciara Break Up? 'Side Chick' Pregnant After 'Flirty' Instagram Cheating Scandal [PHOTOS]

Future 'Cheats' On Ciara With Tyrina Lee? New Break-Up RUMORS Swirl 

Ciara & Future 'Split' After Tyrina Lee Cheating Buzz: Twitter Fans 'Unimpressed' With Rapper 'Creeping' On Baby Mama

Ciara 'Dumps' Future After Tyrina Lee Cheating Scandal? Vacations With Son In Ibiza, No Baby Daddy [PHOTOS] 

Future & Ciara 'Lonely,' Instagram Break-Up Official? Engagement Over, Rapper 'Ignores' & Cheats On Fiancee?

Ciara remains very active on Instagram - and in several recent snapshots, she's definitely not flaunting her engagement ring...

And now, an alleged source for Us Weekly insists that the break-up rumors are indeed true. CiCi won't "put up" with a cheater:

"He cheated on her. Game over," a rumored source reveals. Another snitch adds, "She's devastated. Ciara's focus now is the baby."

Pretty blunt, but apparently that's that.

Do Mstars readers believe the engagement's done for good? Neither singer has yet to respond, but CiCi seems happy to re-focus on her career right now (perhaps without a man):

ciara: "2 Day Was A Good Day. #CCMTVHouseOfStyle Coming Soon. I'm Gonna #DoMore Baby!:) #Zonin. Xo."