 She is artificially inseminated with co-worker Timothy's sperm, desiring to have a biological child of her own, and finds out she is pregnant shortly afterwards in the season 1 finale.However, in season 2, she is diagnosed with life-threatening pre-eclampsia and, consequently, loses the baby.Jesus Adams Foster (season 1–present) was one of the twins that Lena and Stef fostered as children and eventually adopted.