A marriage is void if a party is a current or former stepchild or stepparent of the other party.
Tex. Fam. Code § 6.206
MARRIAGE TO STEPCHILD OR STEPPARENT
Added by Acts 2005, 79th Leg., Ch. 268 (S.B. 6), Sec. 4.17, eff
Official source: Texas Constitution and Statutes. Reproduced from public-domain Texas statutes; confirm against the official source for the current text. Not legal advice.