Reddit reviews Groomed

Survivor of childhood sexual abuse and now sexual assault advocate.

Children don't make this shit up. Unless someone teaches them about sexuality they don't have the context to make up lies about it. If your mother has taught her to refer to her vagina as "her bottom" and she is telling you that your step father deliberately tickles "her bottom", your step father is touching her vagina. Please call the authorities that exist in your location to deal with these issues ASAP. If you call a sexual assault hotline (at least in the USA) they are obligated to report the call and any personal information you give them to CPS.

If the post here are not enough encouragement for you to make that call please follow this link and read about the struggles your child will deal with as an adult if this gets swept under the rug.

https://www.rainn.org/articles/adult-survivors-childhood-sexual-abuse

A child who's parents protected them and stood up for them will have more confidence in their adult life. Please give your daughter the gift of emotional security in her relationship with you.

Also, here is a absolutely gut-wrenching first hand account of the experience of being groomed by a sexual predator (and I think one of the best explanations of how that happens.)
https://www.amazon.com/Groomed-Mother-Little-Waited-Justice/dp/0857208276


She will be SO much better off in adulthood if you do this now instead of waiting.