Another Jinx and Vi Sister Theory

We all know there are many things pointing to Jinx and Vi being or not being sisters, but what about half-sisters? If you look at the two of them side by side, they have some slight similarities in facial structure. However they do not look close enough to be full sisters. So my theory is that the father met someone in Zaun and had baby Jinx. Then during a visit to Piltover, he had an affair that produced Vi. However, he didn’t stick around and only found out about Vi later. Something then happened to Vi’s mother, leaving her on the streets to fend for herself and never be found by her father. Meanwhile the father lost control of Jinx, possible after some Zaun experiment and never told her about her sister until he was on his deathbed. This then sparked Jinx’s interest in Vi, causing her to go to Piltover.