Op...if your in laws are good...they should continue to be good even if you try get them to clean up the act. Being forced to live with bedbugs and cockroaches is not a definition of a good life no matter how trouble free in laws are. Tackle it through your husband. If I were in your place ,I would clearly tell him that this is not something you can adjust to for life and there is no way way I would bring a child into the house till it is pest free. Leave sil's clutter but tackle the rest. Start by collecting everything that can be given to the kabari ....collect and dispose off old newspaper and all rubbish in the house that does not belong to sil . Get the maids to clean up. These days cockroaches can be removed with some gel that is stuck in places they frequent . This is easier than the bed bug problem. You can keep complaining of bed bug bites and ask for pest control. Put antiseptic in clothes wash ....at least yours . Put mattresses out in the sun and spray around the mattresses. Put cots out in the sun and spray them . Do not get pregnant while you are doing pest control.The chemicals are bad and so are the bedbugs and cockroaches. I don't think you live in a good household op. If your family was so good, they would not expect you to live with bedbugs and cockroaches. As for festivals....start at a smaller scale and see what you can manage . Infact do as much decluttering and cleaning using festival as an excuse. Keep your house pest free amd spray the common area that leads to your home ,every night or use the anti cockroach chalk to make rangoli there. At the same time ,tackle the problem at in laws place slowly ...specially during festivals.