Filibuster is a time-honoured tradition in many democratic institutions. The legislature or whatever has a time limit of some sort - quit at midnight, session closes for the season at midnight, etc.
Typically, if a bill fails to make it through the legislature in a session, it must start ovr from scratch next session, reopening the whole debate. If your Texas Leg. is like Canadian and UK parliaments, a bill has:
-First reading, it is introduced in the house and given a reading. (Considering many laws now run into the thousands of pages, this is probably a matter of presnting the material and saying “read it yourself”.
-it is then sent ot committee where the relevant committee(s) will examine it in detail. Changes may be made at this time. The committee members are dedicated to say health, or Finances, or Justice, so they ar more likely to find and repair the flaws, add extra pieces, and tack on pork barrel projects that have no relevance. (Something not allowed in the British system). delegations of lobbyists may appear to make their suggestions and critique the bill.
- once it is passed by the committee vote, it returns to the full house.
- The full house debates the bill, possibly add their own amendments.
-the bill is put to a final vote.
-if passed, the governor signs it into law.
During the full house debate, eah member may have a shot at talking about the bill, theoretically to persuade other members. In fact, they get to listen to the sound of their own voice and cerate sound bites for the media, and propaganda they can quote for their next campaign. In fact, in both US congress and Canadian parliament, apparently a member could appear at the record office (Hansard, here) and “edit” their speech to add whatever they want. Much of what is in the COngressional Record probably was not actually said.
Many legislatures have a schedule - session ends at X. many also don’t have time limits on speaking; but they have rules of order. A filibuster means running out the time by talking until the end of time so no vote can happen. It usually happens when the losing side recognizes they don’t have the votes, so they resort to stall tactics.
So for the filibuster - once the member is recognized, they "have the floor’ and can speak until they stop. the rules for Texas were mentioned - she could not lean, be propped up, etc. - she had to stand on her own. Her speach had to stay on topic - the topic being what the bill was about. As mentioned, when she started talking about RU-486 (abortion pill) instead of medical abortion clinics, someone objected (“point of order”) and she lost the “floor”.
The US Senate has gotten lazy - apparently instead of an actual filibuster, they just have to notify the speaker they intend to. Then, unless the senate votes 60+ to proceed anyway, the bill is stalled. hence, a major cause of deadlock in Washington. There are always rumblings that they may change that rule, but it’s too convenient for both sides…