When you have information from one source that will be used in consecutive sentences, the information should be cited as one in-text citation at the end of the second sentence only. Multiple in-text citations to the similar work over a large piece of text can be visually clashing and is not fully compulsory.
The rule of thumb is to cite the very first sentence, make it clear you are still talking about the same work in your consecutive sentences and then make sure you are still talking about the work by adding another citation at the end (if this has continued for several sentences).
