(See question 3652 above) Q. A housewife during the busy serving of the Sedder drank one of the four cups of wine while she was standing did she comply or does she have to drink another cup?
A. Although Shulchan Aruch (O.H. 472: 4) and other Poskim rule that women do not have to recline while drinking the four Kossos of wine, they maintain that they should be at least seating down while drinking them.
Mishna Berura (422: 28) quotes Shibulei Haleket that although Hallel is required to be recited usually while standing, during the Sedder night it is read while seating, since the night requires that we should behave in the ways of free people and released slaves.
Kovetz Halochos (21: 11) quotes Horav Shmuel Kamentzky's Shlit'a opinion that after the fact, if a woman drank a Kos while standing, she does not have to repeat.
However, Horav Dovid Pam's and Horav Aharon Miller's Shlit'a opinion is that she should drink another cup.
Rabbi A. Bartfeld as revised
by Horav Dovid Pam, Horav Aharon Miller and Horav Chanoch Ehrentreu
Shlit'a