Peace lilies detest cool weather and "wet feet" (soggy soil conditions). Make sure to allow it to dry out a bit before watering it again. Keep it in a bright indoor location (but not direct sunlight) and it should pull out of this slump and start perking up. The Aechmea will not bloom again on the old plant, but the new "pups" will grow and bloom. You can divide them into more plants or leave them to grow and produce in a clump. If you leave them together repotting in time may be useful, however, bromelliads really don't need a lot of soil to do well and tend not to outgrow a pot as fast as most other types of plants.
Feed those plants monthly over the winter with a liquid plant fertilizer product at the lower label rate. In February start to feed every other week and then in March or April go to weekly at the low constant feed label rate. Water enough to keep the soil moist and a little moisture in the cups formed by the tops of the "whorls" of leaves. Don't overdo it you will predispose the plants with problems from root and stem rots.
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