Unm can someone recommend me an isekai with being reborn as the villain,s mom but the vill...

Umm this isn't exactly what you asked for but this made me think of "A Stepmother's Märchen" where the MC is a Villainess who lives together with the 4 children from her Husbands past marriage and she goes back in time (so not exactly Isekai but sort of) and becomes nicer to them.

Ohhh thanks I read it before (=・ω・=) hehe

Sorry, I don't know of any other stories where the protagonist is reincarnated into the villainous mother's body and raises a the villain child. There are a few comics where the protagonist is reincarnated as the mother and raises children, in case you're interested:

http://www.mangago.zone/read-manga/i_became_the_mother_of_the_strongest_demon_lord_s_10_children_in_another_world/

http://www.mangago.zone/read-manga/i_raised_cinderella_preciously/

There are also one-shots, but they have novels that have several translated chapters:

This one is a one-shot, but the novel has 28 translated chapters (check out the site novel updates for the novel):
http://www.mangago.zone/read-manga/i_became_the_black_swan_mother_of_the_white_swan_princess/

This one is a one-shot, but the novel has 20 chapters (check out the site novel updates for the novel)
http://www.mangago.zone/read-manga/i_m_only_a_stepmother_but_my_daughter_is_just_so_cute/

This one isn't a reincarnation, but I love how strong the FL is:

http://www.mangago.zone/read-manga/moto_kizoku_reijou_de_mikon_no_haha_desuga_musumetachi_ga_kawaii_sugite_boukenshagyo_mo_ku_ni_narimasen/
(pretty much a story about a young, badass and doting mom)

Thanks yo(≧∀≦)