Lyra aka Savage She-Hulk is another new addition to the Hulk family, she is the teenage daughter of Hulk and Thundra. Although born far in the future she is the result of a Thundra taking the dna of the current hulk and using it to impregnate herself. (even though her creator wanted it to be the traditional way, the editors changed it for some reason.) After helping her people in the future one last time she now lives in the present. As a fail safe to prevent her from turning on her people they altered her dna to make her weaker as she gets angry.
So it's clear that the original Thundra is her mother.
At the beginning, they talked like it was an alternate future Thundra who conceived Lyra, but it's the same Thundra from Earth-715, who emigrated to Earth-8009 due to time warping erasing her previous future's existence.
Wonder what the plan is for Lyra long term. I like having Thundra around, and don't want her replaced.
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"I'm not smart so much as I am not dumb." - Harlan Ellison
So far we know that Lyra is staying in 616 permantely, marvel is already talking about her staying in a series or two after all this event stuff is over.
Well I hope they don't repeat all the Wolverine-Daken conflcit, in how she deals with her mother. Fighting for a while is kind of understandable, but let them bury the hatchet. Thundra came to understand the problems with her time period, and Lyra has little reason to love the Sisterhood, with how they've treated her.
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"I'm not smart so much as I am not dumb." - Harlan Ellison