CRuzer: A Alman/Garush that marries another Almanah/Grushah only gets 3 days of Sheva Brachos, not 7.
Mommamia: A twice-widowed woman is not supposed to get remarried (except in certain circumstances; this is one of those issues, like Mamzeirus and Igun, where the Poskim use every possibility to be Mattir them).