Not sure I follow you here; if you mean going into her room and fucking her before sleeping you can do that on pretty much day one (or at least the first day that lets you choose actions properly), but she'll only actually like it after about 4 doses (at this point she'll also be fucking you during mornings if you have morning coffee).
Note that I never gave mom the collar until I had her all dosed out however.
Just google Sophie Dee, she's got some very good Brazzers scenes for one.
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