Document with pictures and a diary. Call DOCS of you can. Don't stop going to pick ups you are a step mother and have every right to go if BM doesn't like it she can get stuffed. Can you guys do that thing where she drops off and you pick up and not have to see her? You should be careful as you don't want BM saying you guys are bruising her not saying she will but if DOCS shows up she might to save herself so document everything maybe even videos to show DOCS they ate trained to k ow the signs. Worse case is nothing is happening and it's just an inconvience for a bit.