MTV's Jenelle Evans is on the offensive this week after the Teen Mom 2 star got into a Twitter confrontation with her ex's girlfriend.

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"My exs gf is so thirsty for my attention," tweeted Evans yesterday, "Just stop. Lmfao."

While Evans did not explicitly state which ex or girlfriend she was referring to, fans believed she was referring to Kieffer Delp's current girlfriend.

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Evans and Delp split in 2013. In March it was reported that Delp had begun dating Kelsie, a known online stalker of Evans. She has also been known to run "fan" accounts on social media for the sole purpose of criticizing Evans. The two are currently still together.

It seems someone thought Evans was talking about them and voiced their opinion to her privately, because an hour later Evans returned to Twitter with "I'm flattered you think I'm talking about u, but I'm not". It is possible that Kelsie was the one to say something. Her Twitter account is set to private and so any messages she might have sent would not be attainable by the public.

Evans' diss to her ex's girlfriend came just a few hours after Evans openly defended her children against an online hater who reffered to her sons as "ugly." The mother of two urged her fans to "get" this individual. "Sad life you live," she tweeted, "To put down innocent children."

Teen Mom 2 continues on MTV Wednesdays at 10 p.m. ET/PT.

Tags: Teen Mom 2 MTV Reality TV