This scene is set immediately after the double wedding when they are all dancing and celebrating the happy ending. Benedick doesn't seem to be himself and is not dancing, so Beatrice takes him aside to find out what is wrong.
Beatrice: It is thy wedding night and still thou dost
Maintain the soldier's art: thou makest war.
Benedick: How now, my love?
Beatrice: The armies of dancing feet
Advance upon all sides and thou dost crush them.
Benedick: I have not the heart to jibe with thee this eve,
Nor, it would seem, the head.
Beatrice: Thou dost admit defeat? Ay me,
That day I thought would never come!
But come, since I'm a gentle conqueror,
Yield up to me my tribute with thy lips. (kisses him)
Thou'rt warm.
Benedick: It is thy kisses that have made me so.
Beatrice: Perhaps `tis true that they have made thee hot;
I fear my late distemper thou hast caught.
Benedick: No, no, my love, `tis cupid's fire alone
That burns in me and sets my cheeks aflame,
That lets me have no peace save in thine arms,
Dear Beatrice--(sneezes several times)
Beatrice: O bravely spoke! But though thy words proclaim
Thy health, thy nose gives thee the lie.
Many are the pangs of love, I vow,
But sneezing ne'er is reckon'd among them.
I'faith, love, thou'rt ill.
Benedick: No, forsooth, I--(sneezes several times)
Ah, thou wilt mock at me.
Beatrice: Beshrew my jests, that thou wouldst think it!
No, though I am merry, I am kind.
Thy love has gentled me, dear Benedick.
I'll take thee to thy bed and nurse thy cold,
As befits thy wife.
Benedick: There's more that would
Befit thee, and still strength I have for that.
Good Beatrice, I yield to thy physick.