Good point with regards to Bohemia.
As for Albert and Maria Theresa let's assume they married in 1844 (when Albert married Hildegard and Maria Theresa is 17) here's a potential kid list
- Princess Maria Henrietta b. 1845
- Crown Prince Stephen b. 1848
- Princess Maria Anna b. 1853
- Prince Karl b. 1858
- Princess Maria Theresia b. 1859
- Prince Franz b. 1862
- Princess Maria Mathilda b. 1865
Here we have 3 boys to sure up the succession and 4 girls to use for alliance purposes. I assume the eldest son will be called Stephen in honor of St. Stephen, and one of the girls might be married to an Archduke cousin (in the time-honored tradition of Habsburg intermarriage) while using the other girls for new alliances (France, Belgium, Iberia, Italy, etc...)