Kissing feet and all is crazy if she is doing that she is making a fool of herself and the beemari wala bahana like u r saying she always do that then her family must already be aware of this .
you can ask her if you should make some soup or anything else for her since she is sooo beemar or if she wants you can take her to doctor for check up. then just say in the end “app apna khayal rakha karain” thats it then say “main jaa rahi hoon I have to feed the baby or change the diaper” don’t talk too much ok !