Problem with wife's family

Sir, My wife got pregnant because of IVF treatment and total it's cost 15lakhs and we didn't ask single penny from her family but recently my mom expires due to covid and after me n my wife got covid and she is 7th month pregnant and we admited to hospital for covid treatment at her place we got negative and we are in her place and i don't have single penny of that time because v are hospital and after two days she is getting pains so they took her to govt hospital and there the doctor said it's emergency and she needs to get delivery right now and after normal delivery we got twins but they were in serious position. Doctor suggested me to change the hospital because it's a govt hospital so I asked my wife's family to change the hospital but didn't reply and after they starting arguing with me for other reasons and diverted the topic and after they changed to other govt hospital and after 24 days my twin babies are safe but I didn't forgot the behaviour of there when i seen in both hospitals and after discharge they have taken to their home and recently 5 days back I gone to there house to bring my wife and babies But yesterday her parents came and argued and her father hit me and that time my wife supported there family So I have complaint against him for the issue but after few minutes they came to PS with my wife to complaint against me, but she only given written statement that she will back to my place after 2 months and she gone with my babies In Police station the officer asked her is any fault with your husband and she answered my husband is good and innocent Now her family is telling her to file a false case in disha station so he will listen what we will say and posing her to file a case but she is rejerting. Suppose if she gives complaint against me in disha station what I have to do plz suggest me